Showing posts with label minyak bumi. Show all posts
Showing posts with label minyak bumi. Show all posts

5/26/2016

RISK OF OIL AND GAS INDUSTRIES


Whenever an investor approaches a new industry, it is good to know what the risks are that a company in that sector must face to be successful. General risks apply to every stock, such as management risk, but there are also more concentrated risks that affect that specific industry. In this article, we'll look at the biggest risks that oil and gas companies face.



Political Risk
The primary way that politics can affect oil is in the regulatory sense, but it's not necessarily the only way. Typically, an oil and gas company is covered by a range of regulations that limit where, when and how extraction is done. This interpretation of laws and regulations can also differ from state to state. That said, political risk generally increases when oil and gas companies are working on deposits abroad.
Oil and gas companies tend to prefer countries with stable political systems and a history of granting and enforcing long-term leases. However, some companies simply go where the oil and gas is, even if a particular country doesn't quite match their preferences. Numerous issues may arise from this, including sudden nationalization and/or shifting political winds that change the regulatory environment. Depending on what country the oil is being extracted from, the deal a company starts with is not always the deal it ends up with, as the government may change its mind after the capital is invested, in order to take more profit for itself.

Political risk can be obvious, such as developing in countries with an unstable dictatorship and a history of sudden nationalization - or more subtle - as found in nations that adjust foreign ownership rules to guarantee that domestic corporations gain an interest. An important approach that a company takes in mitigating this risk is careful analysis and building sustainable relationships with its international oil and gas partners, if it hopes to remain in there for the long run.

Geological Risk
Many of the easy-to-get oil and gas is already tapped out, or in the process of being tapped out. Exploration has moved on to areas that involve drilling in less friendly environments - like on a platform in the middle of an undulating ocean. There is a wide variety of unconventional oil and gas extraction techniques that have helped squeeze out resources in areas where it would have otherwise been impossible.
Geological risk refers to both the difficulty of extraction and the possibility that the accessible reserves in any deposit will be smaller than estimated. Oil and gas geologists work hard to minimize geological risk by testing frequently, so it is rare that estimates are way off. In fact, they use the terms "proven," "probable" and "possible" before reserve estimates, to express their level of confidence in the findings.

Price Risk
Beyond the geological risk, the price of oil and gas is the primary factor in deciding whether a reserve is economically feasible. Basically, the higher the geological barriers to easy extraction, the more price risk a given project faces. This is because unconventional extraction usually costs more than a vertical drill down to a deposit. This doesn't mean that oil and gas companies automatically mothball a project that becomes unprofitable due to a price dip. Often, these projects can't be quickly shut down and then restarted. Instead, O&G companies attempt to forecast the likely prices over the term of the project in order to decide whether to begin. Once a project has begun, price risk is a constant companion.

Supply and Demand Risks
Supply and demand shocks are a very real risk for oil and gas companies. As mentioned, operations take a lot of capital and time to get going, and they are not easy to mothball when prices go south, or ramp up when they go north. The uneven nature of production is part of what makes the price of oil and gas so volatile. Other economic factors also play into this, as financial crises and macroeconomic factors can dry up capital or otherwise affect the industry independently of the usual price risks.

Cost Risks
All of these preceding risks feed into the biggest of them all - operational costs. The more onerous the regulation and the more difficult the drill, the more expensive a project becomes. Couple this with uncertain prices due to worldwide production beyond any one company's control, and you have some real cost concerns. This is not the end, however, as many oil and gas companies struggle to find and retain the qualified workers that they need during boom times, so payroll can quickly rise to add another cost to the overall picture. These costs, in turn, have made oil and gas a very capital-intensive industry, with fewer and fewer players all the time.

The Bottom Line
Oil and gas investing isn't going anywhere. Despite the risks, there is still a very real demand for energy, and oil and gas fills part of that demand. Investors can still find rewards in oil and gas, but it helps to know the potential risks that go along with those potential rewards.

Source : Investorpedia

2/02/2016

PENGERTIAN CRUED OIL (MINYAK MENTAH)

Minyak mentah atau crude oil adalah cairan coklat kehijauan sampai hitam yang terutama terdiri dari karbon dan hidrogen. Teori yang paling umum digunakan untuk menjelaskan asal-usul minyak bumi adalah “organic source materials”. Teori ini menyatakan bahwa minyak bumi merupakan produk perubahan secara alami dari zat-zat organik yang berasal dari sisa-sisa tumbuhan dan hewan yang mengendap selama ribuan sampai jutaan tahun. Akibat dari pengaruh tekanan, temperatur, kehadiran senyawa logam dan mineral serta letak geologis selama proses perubahan tersebut, maka minyak bumi akan mempunyai komposisi yang berbeda di tempat yang berbeda.

Komposisi Minyak Bumi
Minyak bumi memiliki campuran senyawa hidrokarbon sebanyak 50-98% berat, sisanya terdiri atas zat-zat organik yang mengandung belerang, oksigen, dan nitrogen serta senyawa-senyawa anorganik seperti vanadium, nikel, natrium, besi, aluminium, kalsium, dan magnesium. Secara umum, komposisi minyak bumi terdiri dari Karbon (C) 84 – 87%, Hidrogen (H) 11 – 14%, Sulfur (S) 0 – 3%, Nitrogen (N) 0 – 1%, Oksigen (O) 0 – 2%.
Berdasarkan kandungan senyawanya, minyak bumi dapat dibagi menjadi golongan hidrokarbon dan non-hidrokarbon serta senyawa-senyawa logam.

1. Hidrokarbon
Golongan hidrokarbon-hidrokarbon yang utama adalah parafin, olefin, naften, dan aromatik.

1.1. Parafin
adalah kelompok senyawa hidrokarbon jenuh berantai lurus (alkana), CnH2n+2. Contohnya adalah metana (CH4), etana (C2H6), n-butana (C4H10), isobutana (2-metil propana, C4H10), isopentana (2-metilbutana, C5H12), dan isooktana (2,2,4-trimetil pentana, C8H18). Jumlah senyawa yang tergolong ke dalam senyawa isoparafin jauh lebih banyak daripada senyawa yang tergolong n-parafin. Tetapi, di dalam minyak bumi mentah, kadar senyawa isoparafin biasanya lebih kecil daripada n-parafin.



1.2. Olefin

Olefin adalah kelompok senyawa hidrokarbon tidak jenuh, CnH2n. Contohnya etilena (C2H4), propena (C3H6), dan butena (C4H8).


1.3. Naften

Naften adalah senyawa hidrokarbon jenuh yang membentuk struktur cincin dengan rumus molekul CnH2n. Senyawa-senyawa kelompok naften yang banyak ditemukan adalah senyawa yang struktur cincinnya tersusun dari 5 atau 6 atom karbon. Contohnya adalah siklopentana (C5H10), metilsiklopentana (C6H12) dan sikloheksana (C6H12). Umumnya, di dalam minyak bumi mentah, naftena merupakan kelompok senyawa hidrokarbon yang memiliki kadar terbanyak kedua setelah n-parafin.


1.4. Aromatik

Aromatik adalah hidrokarbon-hidrokarbon tak jenuh yang berintikan atom-atom karbon yang membentuk cincin benzen (C6H6). Contohnya benzen (C6H6), metilbenzen (C7H8), dan naftalena (C10H8). Minyak bumi dari Sumatera dan Kalimantan umumnya memiliki kadar aromat yang relatif besar.

2. Non Hidrokarbon
Selain senyawa-senyawa yang tersusun dari atom-atom karbon dan hidrogen, di dalam minyak bumi ditemukan juga senyawa non hidrokarbon seperti belerang, nitrogen, oksigen, vanadium, nikel dan natrium yang terikat pada rantai atau cincin hidrokarbon. Unsur-unsur tersebut umumnya tidak dikehendaki berada di dalam produk-produk pengilangan minyak bumi, sehingga keberadaannya akan sangat mempengaruhi langkah-langkah pengolahan yang dilakukan terhadap suatu minyak bumi.


2.1. Belerang

Belerang terdapat dalam bentuk hidrogen sulfida (H2S), belerang bebas (S), merkaptan (R-SH, dengan R=gugus alkil), sulfida (R-S-R’), disulfida (R-S-S-R’) dan tiofen (sulfida siklik). Senyawa-senyawa belerang tidak dikehendaki karena :
a. menimbulkan bau tidak sedap dan sifat korosif pada produk pengolahan.
b. mengurangi efektivitas zat-zat bubuhan pada produk pengolahan.
c. meracuni katalis-katalis perengkahan.
d. menyebabkan pencemaran udara (pada pembakaran bahan bakar minyak, senyawa belerang teroksidasi menjadi zat-zat korosif yang membahayakan lingkungan, yaitu SO2 dan SO3).


2.2. Nitrogen

Senyawa-senyawa nitrogen dibagi menjadi zat-zat yang bersifat basa seperti 3-metilpiridin (C6H7N) dan kuinolin (C9H7N) serta zat-zat yang tidak bersifat basa seperti pirol (C4H5N), indol (C8H7N) dan karbazol (C12H9N). Senyawa-senyawa nitrogen dapat mengganggu kelancaran pemrosesan katalitik yang jika sampai terbawa ke dalam produk, berpengaruh buruk terhadap bau, kestabilan warna, serta sifat penuaan produk tersebut.


2.3. Oksigen

Oksigen biasanya terikat dalam gugus karboksilat dalam asam-asam naftenat (2,2,6-trimetilsikloheksankarboksilat, C10H18O2) dan asam-asam lemak (alkanoat), gugus hidroksi fenolik dan gugus keton. Senyawa oksigen tidak menyebabkan masalah serius seperti halnya senyawa belerang dan senyawa nitrogen pada proses-proses katalitik.


3. Senyawa logam

Minyak bumi biasanya mengandung 0,001-0,05% berat logam. Kandungan logam yang biasanya paling tinggi adalah vanadium, nikel dan natrium. Logam-logam ini terdapat bentuk garam terlarut dalam air yang tersuspensi dalam minyak atau dalam bentuk senyawa organometal yang larut dalam minyak. Vanadium dan nikel merupakan racun bagi katalis-katalis pengolahan minyak bumi dan dapat menimbulkan masalah jika terbawa ke dalam produk pengolahan.

Sumber : Buku Pintar Migas

2/01/2016

MINYAK BUMI SERTA PROSES TERJADINYA YANG PATUT DIKETAHUI

Minyak Bumi jika diartikan dalam bahasa inggris adalah petroleum dan bila diartikan dalam bahasa latin adalah karang dan oleum. Serta minyak bumi juga sering dijuluki dengan emas hitam. Dalam pengetian minyak bumi atau emas hitam ini yakni dengan unsur cairan kental, memiliki warnacokelat gelap, serta kehijauan dan mudah terbakar dan biasa nya minyak bumi ini berada di dasar kerak bumi atau dasar bumi.

Minyak bumi ini juga terdiri dari beberapa hal diantaranya terdiri dari campuran hidrokarbon dan sebagian besar dari alkana dan bervariasi dalam kemurniannya. Minyak bumi juga mempunyai beberapa komposisi yakni yang tersusun atas senyawa hidrokarbon yang tidak sama atau berbeda-beda. Dalam komposisi tersebut minyak bumi memiliki senyawa hidrokarbon yang meliputi


ALKANA

Alkana sering kali dikenal dengan parafin. Parafin tersebut dengan pengetian senyawa hidrokarbon tersatuasi dan dalam senyawa itu mengandung rantai lurus/bercabang dan biasanya terdiri dari atom karbon dengan simbul (C) dan (H)

SIKLOALKANA

Biasa juga disebut senyawa hidrokarbon yang berbentuk cincin.

HIDROKARBON AROMATIK

Hidrokarbon ini adalah sesuatu yang tidak tersaturasi, dan bukan hanya memiliki satu cincin melainkan lebih dari satu cincin yang biasanya disebut planar karbon-6 atau dengan istilah cincin benzene. Jika hidrokarbon ini mengalami pemanasan/pembakaran maka akan menimbulkan asap yang begitu pekat yang berwarna hitam dengan istilah latin karsinogen dan biasanya bisa menjadi pemicu penyakit kanker.

Minyak Bumi juga terdapat beberapa kandungan unsure kimia yang patut diketahui diantaranya:
  • SULFUR (BELERANG)
Minyak bumi atau minyak mentah yang belum diolah sangat besar mengandung belerang, belerang ini biasanya mudah terbentuk dalam keadaan basah dan biasanya dikenal dengan istilah gasoline atau korosi.
  • OKSIGEN
  • NITROGEN
  • LOGAM
MINYAK BUMI SERTA PROSES TERBENTUKNYA

Minyak bumi awal mulanya terbentuk karena terurainya beberapa senyawa organik dari mikroorganisme dengan jutaan tahun didalam dasar laut dan di darat. Biasanya terjadinya uraian ini disebabkan oleh beberapa sisa tumbuhan dan hewan dan kemudian tertimbun oleh lumpur, dan oleh zat-zat yang lainnya. Dengan terjadinya penguraian selama berjuta tahun maka proses minyak bumi akan terbentuk secar perlahan dan minyak bumi ini adalah merupakan sumberdaya yang tidak dapat diperbaharui.

HASIL DARI PENGOLAHAN MINYAK BUMI

Minyak bumi sampai sekarnag ini sangat sering kita jumpai dalam kehidupan sehari-hari dan bahkan tanpa sadar terkadang tidak mengetahui hal tersebut berasal dari olahan minyak bumi yang melalui berbagai proses. Hasil tersebut diantaranya:
  • Residu
  • Oli
  • Solar
  • Kerosin dan Avtur
  • Nafta
  • Petroleum Eter dan Bensin
  • Gas
Dampak yang akan timbul pad lingkungan jika minyak bumi terus digunakan
Dampak yang sangat besar terjadi bila minyak bumi ini digunakan secara terus menerus diantara:
  • Pemanasan global
  • Ekstrasi
  • Pencemaran Air
Sekian artikel yang bisa saya bagikan tentang minyak bumi semoga artikel ini bisa menjadi bahan pengetahuan baru bagi kita. Jika dalam penulisan artikel yang bertema minyak bumi ini masih terdapat kekurangan dan kesalahan saya mohon maaf.

Tujuan penulisan artikel minyak bumi ini hanya semata untuk membagikan pengetahuan baru kepada pembaca. Sampaikan kritik dan saran kalian lewat kolom komentar. Terimakasih


1/06/2016

GENERAL GUIDELINES HSE (HEALTH, SAFETY & ENVIRONMENT)


HISTORY HSE

Traditional Era (1750 BCE)

Code of Hammurabi: Act early work safety


The Industrial Revolution (1750-1850)

Changes in work systems, use of engine power, introduction of new methods of processing raw materials, organization of work, Emerging diseases associated with exposure

Industrialization era

K3 developments following the use of technology (PPE and Safety Equipment)


Management era

H.W Heinrich: Domino Theory
Frank Bird and Germain: The theory of causation Loss Model
ISO, SMHSE, OHSAS 18001



REGULATION LEGISLATION & LEGAL BASIS

UU No. 1 of 1970: Safety

UU No. 13 of 2009: Job Agency

UU No. 22 of 2001: Oil and Gas

UU No. 32 of 2009: Protection and Management of LH

MPR (Mijn Politie Reglement) No. 341 of 1930

Regulation No. 19 of 1973: Regulation and Supervision of Safety in Mining

Government Regulation No. 35 of 2004: Upstream Oil and Gas

Regulation No. 34 of 2005: Amendment to Government Regulation No. 35 of 2004 Upstream Oil and Gas

Mining candy No. 02 / P / M / Pertamb / 1975: Safety at Pipe Fittings Suppliers and facilities for Transportation of Oil and Gas Excluding Oil and Gas Mining Concession Area

Kepmentamben No. 300.K / 38 / M.PE / 1997: Safety Pipe Distributors of Oil and Gas

ESDM No. 045 of 2006: Management of Drilling Mud, Mud Waste and Drill powder on Drilling Activity Oil and Gas

1/05/2016

Drilling Rig (Jenis-jenis RIg)

Drilling rig is an installation of equipment to drill into underground reservoirs for water, oil, or gas, or mineral deposits underground. Drilling rig could be on land (onshore) or at sea / offshore depending on the needs of its user. Although the offshore rig can drill down to the bottom of the sea to search for minerals, technology and economics of underwater mines can not be done commercially. Therefore, the term "rig" refers to a collection of tools used to carry out drilling on the surface of the Earth's crust to sample the oil, water, or mineral. In a drilling installation, especially for oil and gas and geothermal drilling, typically using the specifications of the equipment that is able to work at a high enough pressure rating ranging from 2000 psi up to 15,000 psi.Rigs drilling for oil and natural gas can be used not only to identify the geological characteristics of the reservoir, but also to create a hole that allows the retrieval content of oil or gas from the reservoir.System main drilling rig consists of:1. Hoisting System

System lifter (Hoisting System) is one of the main components of the rig that serves to help the system tools player in drilled wells by providing tools that fit and work space required to lift and lower the drill string, casing string and subsurface equipment (underground) Other and from the wellbore. Lifting system consists of two (2) sub main parts, namely:1.1. Supporting frame (Supporting Structure) is a steel frame construction which is assembled or built on the point of wells (drilling site) whose job it is to support a series of drill pipe equipment and other equipment used by players to drill holes system.Supporting framework (Supporting Structure) consists of: a. Substructure is a large steel construction purposes are built to be the basis and support the drill tower whose height is determined by the needs of wild bursts deterrent. This substructure into the workplace for activities above and below the rig floor.

b. Drilling tower (Derrick / Mast) function of derrick is to provide space for the lifting or enter a series of drill pipe or into the wellbore. The higher the derrick, the longer the series of drill pipe that can be handled, so the faster the process of making a trip operation.



1.2. Lifting equipment (Hoisting equipment)

Is a special equipment for lifting, lowering and hang a series of drill pipe (consisting of Drill Pipe, Drill Collar, etc.) And drill bit (Drilling bits) in the wellbore.Lifting equipment consists of:a. Drawwork engine unit towing / lifting Strong (winch) located near a table on the floor Rig player.

b. Overhead Tools (Tools Upper)A "chain link" in the lifting system consisting of: - Crown Block: Unit wheels / pulleys-pulley (sheaves-sheaves) located at the top of the tower of drilling.- Travelling Block:The composition of the wheels / pulleys-pulley (sheaves-sheaves) are hung under the crown block above the drill floor. Together with the crown block pulley hoist system formed. - Hook (hook):The hook-shaped tools which are located below the traveling block in which the swivel and a series of drill pipe hanging during drilling operations.- Elevator:Tweezers are very strong and hung on the lick (hanger elevators) associated side Travelling block or hook. These elevators are used to decrease or increase the portions series drill pipe to and from boreholes.c. Drilling Line



High-strength steel wire rope which is a liaison from Drawwork, Crown Block and Block Travelling to attract other overhead equipment in lowering their duties, draw or hang a series of drill pipe and others.2. Circulating SystemCirculating System is a part of the main system that functioned in a drilling rig to circulate drilling mud, drilling down through a series of pipes and climbed into the annular carrying powder permukaan.Aliran drill to drill mud when circulation will pass through parts: a. Mud mud tank to pump b. Mud high pressure pump to the connection surface and into drillstring c. Drillstring to bits d. Bit up through the annulus to the surface e. Until the surface is going through solid control equipment, such as;1. Shale Shaker

2. Desander

3. Desilter

4. CentrifugeIt is aimed at cutting filtration of drilling mud that mud back to the suction tank (suction pit) back clean. And keep repeating until the completion of drilling work.Travelling in the mud of the bit to the surface will bring a lot of information including the rock sample in the form of cutting, it is also sometimes at a particular location will bring non-hydrocarbon gas such as H2S, CO that are harmful to living things around the place.3. Rotating SystemRotating system (system player) is one of the components - the main components of a drilling rig. Its main task is rotating drill bit, drill a burden and give the channel a high-pressure mud into the drill bit to drill to make the hole. The player system consists of four main sub-components:Swivel (head cleansing)

Rotating Assembly (Unit player)

Petroleum System


Five Key Elements of Petroleum Geology


What the Petroleum System?

Petra: Stone
Oleum: Oil


Terminology concerning the search for oil and gas with reference to the disciplines of geology
A geological concept with a closed system which explains the presence of oil and gas

ORIGIN PETROLEUM → inorganic

THEORYOIL FROM volcanic activity (Vesuvius)

Mendeleyeff Chain Reaction
Supporters of the theory: Von Humbold & Gay Lussac (1805), Virlet d'Aoust (1834), Berthelot (1866), Mendeleyeff (1877)

Example: Ghawar Field (Russia), 60 Billion Barrel Oil remained controversial until now

Picture3.png

Supporters of the theory: Haquet (1794), Tissot (1974), etc.

Properly used in the Mahakam (No significant Volcanic Activity)
Debate 'Chicken - Egg' Which is the first

All oil companies embrace this theory, except Russia


 
Five Key Elements of Petroleum Geology

Picture4

1.Source Rock

2.Reservoir Rock
3.Timing / Maturation / Migration
4.Cap Rock
5.Trap


CONCLUSION


- Petroleum Geology is a concept that describes the search for oil and gas based disciplines of geology
- Five Key Elements is very important in the search for oil and gas


Petrolium System so on, you can visit other topic :
GENERAL GUIDELINES HSE (HEALTH, SAFETY & ENVIRONMENT)
Drilling Rig

 May you have concern to improve my blog, please comment on below.

Thanks.