Control factors of high and stable production of Jurassic Da’anzhai Member tight oil in central Sichuan Basin, SW China
YANG Guang1, HUANG Dong1, HUANG Pinghui2, YAN Weipeng3, YANG Tianquan1, DAI Hongming4, LIN Jianping2
1. Exploration and Development Research Institute, PetroChina Southwest Oil & Gas Field Company, Chengdu 610041, China; 2. Central Sichuan Oil & Gas Field, PetroChina Southwest Oil & Gas Field Company, Suining 629000, China; 3. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China; 4. Southwest Petroleum University, Chengdu 610500, China
Abstract：By systematically analyzing the basic geological characteristics of tight oil in Jurassic Da’anzhai Member in the middle of Sichuan Basin (Central Sichuan area) and combining with a large number of exploration and development data, we examine the main controlling factors and exploration direction for high and stable production of tight oil. Tight oil in the Da’anzhai Member has the following characteristics: large and low abundance resources; generally tight, relatively high quality reservoirs; adjacent source rocks and reservoirs, favorable migration and accumulation of oil; extensive oil-bearing pores. Development practice reveals that the high and stable production oil wells for tight oil are mainly distributed in fractured vuggy reservoirs in the shore-lacustrine sedimentary subfacies, and fractures are very important in affecting the high and stable production of tight oil in the Da'anzhai Member. Natural gas plays an important role (gas drive) in petroleum migration and accumulation and high production of oil wells. Combined with the characteristics of high and stable production, exploration and development results, drilling cost and other factors, it is considered that the Da’anzhai Member located in the middle and south part of Sichuan Basin is a promising field for exploration and development of tight oil in the Jurassic of the Sichuan Basin.
杨光, 黄东, 黄平辉, 闫伟鹏, 杨天泉, 戴鸿鸣, 林建平. 四川盆地中部侏罗系大安寨段致密油高产稳产主控因素[J]. 石油勘探与开发, 2017, 44(5): 817-826.
YANG Guang, HUANG Dong, HUANG Pinghui, YAN Weipeng, YANG Tianquan, DAI Hongming, LIN Jianping. Control factors of high and stable production of Jurassic Da’anzhai Member tight oil in central Sichuan Basin, SW China. Petroleum Exploration and Development, 2017, 44(5): 817-826.
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2017, Vol. 44 
