| An optimization method for equivalent bulk permeability of gas shale matrix with crushed samples and re-recognition of the influence of pressure and particle size | |
Jiang WB(江文滨) ; Ji LL(姬莉莉); Luo, Chao; Lin M(林缅); Cao GH(曹高辉); Hao, Fang; Chen Z(陈卓); He YF(何宜繁)
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| Source Publication | MARINE AND PETROLEUM GEOLOGY
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| 2023-10-01 | |
| Volume | 156Pages:106455 |
| ISSN | 0264-8172 |
| Abstract | The pressure decay (or gas expansion) test with crushed samples has been used to evaluate the matrix permeability of shale and other low-permeability rock for many years. However, there still exist uncertainties relating to particle size and equilibrium pressure. The existing late-stage curve fitting method has the advantage of easy calculation, but the assumption that gas enters particles with a single permeability value is not generally applicable for shale samples, and late-stage analysis may lead to underestimation. This study proposes an optimization method to determine the equivalent bulk permeability that ensures the smallest sum of squares of errors between the forward-predicted pressure decay curve and the measure one. Both the optimization and curve fitting method are applied to two shale samples from the Ordovician Wufeng Formation of two wells in the Sichuan Basin, China with improved apparatus and testing procedures. The optimization method is superior to the curve fitting method in the repeatability and regularity on the change of apparent permeability with pressure. A strong linear relationship between apparent permeability and coefficient of compressibility is established between 3 and 12 bars. The variation of permeability with particle size is more diverse than that is commonly understood and might be nonmonotonic, depending on the change of pore structure during crushing. Change of apparent permeability with pressure (non-Darcy feature) is proposed as a criterion of whether pore structure has changed significantly. It is suggested to measure the variation of permeability with pressure and particle size to obtain a more comprehensive understanding of matrix permeability and pore structure. |
| Keyword | Shale gas Crushed sample Matrix permeability Non-Darcy Optimization method |
| DOI | 10.1016/j.marpetgeo.2023.106455 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001061642900001 |
| WOS Research Area | Geology |
| WOS Subject | Geosciences, Multidisciplinary |
| Funding Organization | Strategic Priority Research Program of the Chinese Academy of Sciences [XDA14010304] ; National Natural Science Foundation of China [42030808, 41690132, 41872163] ; Petro China Science and Technology Major Project [2019F-31-01] |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Ji, LL ; Lin, M (corresponding author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/92651 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.{Jiang Wenbin, Ji Lili, Lin Mian, Cao Gaohui, Chen Zhuo} Chinese Acad Sci Inst Mech Beijing 100190 Peoples R China 2.{Jiang Wenbin, Ji Lili, Lin Mian, Chen Zhuo} Univ Chinese Acad Sci Sch Engn Sci Beijing 100190 Peoples R China 3.{Luo Chao, He Yifan} PetroChina Southwest Oil & Gasfield Co Chengdu 610051 Sichuan Peoples R China 4.{Luo Chao, He Yifan} PetroChina Southwest Oil & Gasfield Co Shale Gas Res Inst Chengdu 610051 Sichuan Peoples R China 5.{Hao Fang} China Univ Petr Sch Geosci Qingdao 266580 Shandong Peoples R China |
| Recommended Citation GB/T 7714 | Jiang WB,Ji LL,Luo, Chao,et al. An optimization method for equivalent bulk permeability of gas shale matrix with crushed samples and re-recognition of the influence of pressure and particle size[J]. MARINE AND PETROLEUM GEOLOGY,2023,156:106455. |
| APA | 江文滨.,姬莉莉.,Luo, Chao.,林缅.,曹高辉.,...&何宜繁.(2023).An optimization method for equivalent bulk permeability of gas shale matrix with crushed samples and re-recognition of the influence of pressure and particle size.MARINE AND PETROLEUM GEOLOGY,156,106455. |
| MLA | 江文滨,et al."An optimization method for equivalent bulk permeability of gas shale matrix with crushed samples and re-recognition of the influence of pressure and particle size".MARINE AND PETROLEUM GEOLOGY 156(2023):106455. |
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| Jp2023Fa198.pdf（16901KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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