An overview on study of chlorite films in clastic reservoirs
Ma Pengjie1, Lin Chengyan1, 2, Zhang Shiqi1, Dong Chunmei1, Wei Mengji1
1 School of Geosciences,China University of Petroleum(East China),Qingdao 266580,Shandong; 2 Reservoir Geology Key Laboratory of Shandong Province,China University of Petroleum(East China),Qingdao 266580,Shandong;
Abstract Chlorite films were common in clastic rock reservoirs,and their inhibiting overgrowth of quartz and influence on reservoir properties are research focus at home and abroad. Study history of chlorite films was reviewed and the current research results were summarized,including micro-morphological occurrence,timing and mechanism of chlorite growth,controlling factors,their inhibiting overgrowth of quartz and influence on reservoir properties. Results show that: (1)Most of the discovered chlorite films are Fe-rich with “two layers structure”following Ostwald processes. The inner part adjacent to grain is finer-crystalline chlorite which is mainly parallel to the grain surface,and the outer part near pore space is coarser-crystalline which is generally perpendicular to the grain surface. Fe-rich clay films,precursor minerals of the inner part,will recrystallize in the eogenetic stage,and continue to precipitate based on the incipient chlorite films. (2)Ferromagnesian minerals,like volcanic materials(volcanic debris and ash)and dark minerals(biotite and amphibole),are the main sources of chlorite films,and their enrichment are closely related to hydrodynamic facies,such as the subaqueous distributary channel and mouth bar in the deltaic front. (3)The growth morphology of pore-lining chlorite films is affected by hydrocarbon injection in diffident places. (4)Chlorite films help to protect the intergranular pore,but easily damage the pore-throat connectivity. Finally,existing problems and research trend on chlorite films were proposed.
Fund:Co-funded by the sub-project of National Significant Petroleum Special Projects of China(No.2011ZX05006-004)and Fundamental Research Funds for the Central Universities(No.16CX06037A)
About author: About the first author Ma Pengjie,born in 1989,is a doctoral candidate in China University of Petroleum(East China). He is engaged in sedimentology and reservoir geology. E-mail: mpj1989@126.com.About the corresponding author Zhang Shiqi,born in 1971,is a professor and master supervisor,with a Ph.D. degree of mineral prospecting and exploration obtained from China University of Petroleum(East China). He is engaged in sequence stratigraphy,sedimentology and reservoir geology. E-mail: shqzhang@upc.edu.cn.
Cite this article:
Ma Pengjie,Lin Chengyan,Zhang Shiqi et al. An overview on study of chlorite films in clastic reservoirs[J]. JOPC, 2017, 19(1): 147-159.
Ma Pengjie,Lin Chengyan,Zhang Shiqi et al. An overview on study of chlorite films in clastic reservoirs[J]. JOPC, 2017, 19(1): 147-159.
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