Difference of micro-pore throat characteristics in extra-low permeability sandstone of different pore throat matching relationship

Gao Hui; Jing Xiaofeng; Zhang Lan

doi:10.11781/sysydz201304401

Volume 35 Issue 4

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Article Navigation > PETROLEUM GEOLOGY & EXPERIMENT > 2013 > 35(4): 401-406

HU Zong-quan, WANG Chuan-gang, ZHANG Yu-lan, ZHANG Fu-shun, ZHOU Xin-ke. EVALUATION ON THE HYDROCARBON POOL-FORMING CONDITIONS OF THE UPPER PALEOZOIC BURIED HILLS IN THE DONGPU SAG OF THE BOHAIWAN BASIN[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2004, 26(6): 553-556. doi: 10.11781/sysydz200406553

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Gao Hui, Jing Xiaofeng, Zhang Lan. Difference of micro-pore throat characteristics in extra-low permeability sandstone of different pore throat matching relationship[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(4): 401-406. doi: 10.11781/sysydz201304401

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Difference of micro-pore throat characteristics in extra-low permeability sandstone of different pore throat matching relationship

doi: 10.11781/sysydz201304401

1.
College of Petroleum Engineering, Xi'an Shiyou University, Xi'an, Shaanxi 710065, China
2. Yaerxia Oil Field Working Quarter, Yumen Oilfield Company, Jiuquan, Gansu 735200, China
3. Laojunmiao Oil Field Working Quarter, Yumen Oilfield Company, Jiuquan, Gansu 735200, China

Received Date: 2012-09-01
Rev Recd Date: 2013-05-20
Publish Date: 2013-07-28

Abstract

Abstract

There are different pore throat matching relationship and micro-pore throat characteristics for similar or equal sandstones because of different deposition and diagenesis reconstruction. Taking the Chang6 sandstone of Yanchang Formation in Wuqi area and the X₂ sandstone of Xishanyao Formation in Niujuanhu area as the objects, the micro-pore throat characteristics in different pore throat matching relationships are evaluated quantitatively using physical property testing, cast section and constant rate mercury penetration technique. The results show that there are no obvious differences in pore parameters, and the differences of micro-pore throat characteristics are mainly presented in throat parameters for samples with different permeabilities. As to the X₂ sandstone, the generation of dissolution pores and intercrystal pores leads to high content of curved lamellar and tube bundle throat, small throat radius and narrow distribution, concentrated contribution of throat to permeability, fine average throat radius and main flow throat radius, high content of big pore throat ratio in Niujuanhu area. In the Chang6 sandstone, necking, flaky and curved lamellar throats develop, throat radius vary obviously, and big throats are in high content, which can be explained by the generation of primary intercrystal pores. Different steps should be taken in the development process for extra-low permeability sandstone reservoirs which present different pore throat matching relationships.
- pore throat type,
- differences of pore throat,
- extra-low permeability sandstone,
- Yanchang Formation,
- Xishanyao Formation,
- Wuqi area,
- Niujuanhu area

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沈阳化工大学材料科学与工程学院沈阳 110142

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Difference of micro-pore throat characteristics in extra-low permeability sandstone of different pore throat matching relationship

doi: 10.11781/sysydz201304401

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Difference of micro-pore throat characteristics in extra-low permeability sandstone of different pore throat matching relationship

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