Evaluation And Optimization Production Of Low Permeability Carbonate Reservoir By Hydraulic Fracturing In “Jaso Field”

“Jaso field” is located the South Sumatra basin, Indonesia. The lithology of this field is dominated by limestone / carbonate reservoirs with varying permeability (low / tight to high / porous). Acid Fracturing stimulation has been applied to develop this field, because in ideal conditions (with the solubility test between acid and formation > 80%) wormholes will be made in the formation to increase reservoir conductivity and productivity. However, in the Jaso oil field, in some special cases, acid injection did not provide satisfactory results for increasing well conductivity and productivity.In this thesis, we conduct research and evaluation of wells in Jaso field. For example: JS-28, JS-11 and JS-40 are oil wells in the Jaso field with low / narrow reservoir permeability and production rates. Stimulation has been carried out in the JS-28 well, but the results are still below the acid expectation even though the intermediate solubility test (solubility test) is more than 88%.Hydraulic Fracturing with the sandfracturing method (injecting sand proppant with high pressure and exceeding the gradient fracture) has been successfully applied to three wells in the Jaso Field by increasing the oil production rate by more than 100 bopd per well. With this case study, we find that the application of hydraulic fracturing (sandfracturing) with thrusters is not limited to sandstone / sandstone reservoirs, but that this method can be successfully applied to increase the conductivity and productivity of carbonate reservoirs (in special cases) taking into account several parameters of integrity. reservoir wells and characteristics.

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Study on the Nonlinear Flow Percolation Law in Low Permeability Carbonate Reservoir of HF Oilfield

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.644-650.5065 ◽

2014 ◽

Vol 644-650 ◽

pp. 5065-5070

Author(s):

Shuai Jiang ◽

Zheng Ming Yang ◽

Xue Wei Liu ◽

Meng Ting Wang ◽

Qian Zhang

Keyword(s):

Oil Industry ◽

Carbonate Reservoir ◽

Oil Field ◽

Carbonate Reservoirs ◽

Nonlinear Flow ◽

Low Permeability ◽

High Permeability ◽

Threshold Pressure Gradient ◽

Flow Situation ◽

Low Permeability Reservoirs

With the development of the global oil industry,the production of the normal or high permeability reservoirs decline rapidly. Therefore, more and more low permeability reservoirs are used to the production stimulation. The oilfields overseas make great contribution to CNPC. The HF oilfield is one oilfield that the CNPC have in overseas. The HF oilfield is mainly the low permeability carbonate reservoirs which make it not easy to economically exploit. Due to the reason that the low permeability carbonate reservoirs present small porosity and the fluid’s flow situation in the low permeability carbonate reservoirs, the flow doesn't obey the Darcy's law. Thus it is greatly necessary to study the non-Darcy percolation characteristics. In this paper, the HF ‘s low permeability is tested and the threshold pressure gradient test is finished ,according to the experiment results, the nonlinear percolation ‘s law ,which is suited to HF-oil field , is illustrated and the reservoir classification is achieved.

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Injection-production optimization of carbonate reservoir based on an inter-well connectivity model

Energy Exploration & Exploitation ◽

10.1177/0144598721994653 ◽

2021 ◽

pp. 014459872199465

Author(s):

Yuhui Zhou ◽

Sheng Lei ◽

Xuebiao Du ◽

Shichang Ju ◽

Wei Li

Keyword(s):

History Matching ◽

Water Injection ◽

Field Application ◽

Carbonate Reservoir ◽

Production Optimization ◽

Oil Field ◽

Carbonate Reservoirs ◽

Utilization Rate ◽

Production Volume ◽

Connectivity Model

Carbonate reservoirs are highly heterogeneous. During waterflooding stage, the channeling phenomenon of displacing fluid in high-permeability layers easily leads to early water breakthrough and high water-cut with low recovery rate. To quantitatively characterize the inter-well connectivity parameters (including conductivity and connected volume), we developed an inter-well connectivity model based on the principle of inter-well connectivity and the geological data and development performance of carbonate reservoirs. Thus, the planar water injection allocation factors and water injection utilization rate of different layers can be obtained. In addition, when the proposed model is integrated with automatic history matching method and production optimization algorithm, the real-time oil and water production can be optimized and predicted. Field application demonstrates that adjusting injection parameters based on the model outputs results in a 1.5% increase in annual oil production, which offers significant guidance for the efficient development of similar oil reservoirs. In this study, the connectivity method was applied to multi-layer real reservoirs for the first time, and the injection and production volume of injection-production wells were repeatedly updated based on multiple iterations of water injection efficiency. The correctness of the method was verified by conceptual calculations and then applied to real reservoirs. So that the oil field can increase production in a short time, and has good application value.

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First microseismic monitoring results for a Middle East carbonate reservoir: Minagish oil field case study, western Kuwait

10.3997/2214-4609-pdb.246.145 ◽

2008 ◽

Author(s):

Emmanuel Gaucher ◽

Christophe C. Maisons ◽

Abdullatif Y. Al-Kandari ◽

Kamal Al-Atroshi and Jassim M. Al-Kanderi

Keyword(s):

Middle East ◽

Microseismic Monitoring ◽

Carbonate Reservoir ◽

Oil Field ◽

Field Case

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Case Study: Steam Injection Step Rate Tests Run in the Shallow Low Permeability Diatomite Formation, Orcutt Oil Field, Careaga Lease, Santa Barbara County, California

10.2118/169513-ms ◽

2014 ◽

Cited By ~ 2

Author(s):

Ramon Elias ◽

Ian Marquardt ◽

Mason Medizade

Keyword(s):

Steam Injection ◽

Oil Field ◽

Low Permeability ◽

Santa Barbara ◽

Step Rate ◽

Santa Barbara County

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Leak-Off Coefficient Analysis in Stimulation Treatment Design

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.933.202 ◽

2014 ◽

Vol 933 ◽

pp. 202-205

Author(s):

Bo Cai ◽

Yun Hong Ding ◽

Yong Jun Lu ◽

Chun Ming He ◽

Gui Fu Duan

Keyword(s):

Hydraulic Fracturing ◽

Field Method ◽

Oil Field ◽

Low Permeability ◽

Analysis Model ◽

Fracturing Fluid ◽

Real Time Analysis ◽

Fracturing Fluids ◽

Common Technique ◽

Treatment Design

Hydraulic fracturing was first used in the late 1940s and has become a common technique to enhance the production of low-permeability formations.Hydraulic fracturing treatments were pumped into permeable formations with permeable fluids. This means that as the fracturing fluid was being pumped into the formation, a certain proportion of this fluid will being lost into formation as fluid leak-off. Therefore, leak-off coefficient is the most leading parameters of fracturing fluids. The accurate understanding of leak-off coefficient of fracturing fluid is an important guidance to hydraulic fracturing industry design. In this paper, a new field method of leak-off coefficient real time analysis model was presented based on instantaneous shut-in pressure (ISIP). More than 100 wells were fractured using this method in oil field. The results show that average liquid rates of post-fracturing was 22m3/d which double improvement compared with the past treatment wells. It had an important role for hydraulic fracturing stimulation treatment design in low permeability reservoirs and was proven that the new model for hydraulic fracturing treatment is greatly improved.

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