朝阳沟油田扶余油层粘土矿物的特征及其对油层压裂效果的影响CHARACTERISTICS OF CLAY MINERALS IN FUYURESERVOIR, CHAOYANGGOU OIL FIELD AND THEIRINFLUENCE ON THE FRACTURING RESULTS OFRESERVOIRS
王行信
Wang Xingxin(Institute of Exploration & Development;
摘要(Abstract)：
朝阳沟油田扶余油层的粘土矿物组成随埋深不同而异。粘土矿物的产状有分散质点式、薄膜式和搭桥式三个基本类型。粘土矿物中高岭石和伊利石的含量增多时，油层压裂效果变差，尤其高岭石的影响更为明显。其原因是高岭石的片状集合体易被打碎，随压裂液移动并堵塞孔隙喉道。而蒙脱石-绿泥石在形成的时候和自生石英紧密共生，与颗粒表面有较强的附着力，在压裂过程中不易移动。因而其含量增高时，油层压裂效果有变好的趋势。
ABSTRACT
Comrositions of the clay minerals in Fuyu reservoir, Chao Yanggou Oil Field, vary with depth. There are three basic occurrence types of clay minerals-dispersed particle, thin film and bridge. Reservoir fracturing results become poorer with the increase of kaolinite and illite in clay minerals, especially kaolinitc. The reason is that scale aggregate of the kaolinite is easy to be broken, then moves together with fracturing fluid and plug pore throat.While montmorillonitc-chlorite were closely associated with autogenic quartz, with stronger adhesion on particle surfaces, they are not easy to be moved during fracturing. Therefore with the increase of montmorillonite-chlorile, fracturing become more successful.
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作者(Authors):
王行信
Wang Xingxin(Institute of Exploration & Development;
DOI: 10.19597/j.issn.1000-3754.1987.01.004