东辛油田断层转换带与油气富集

Relationship between petroleum accumulation and transfer zone in Dongxin Oilfield

东辛油田位于济阳坳陷东营凹陷中央隆起带东段,被数百条断层切割,是典型的复杂断块油田。应用断层转换带的理论,识别出东辛油田的11个断层转换带,分为4种类型(平行同向断层型,平行对向断层型,叠覆断层型,趋近断层型)。东部辛镇地区以平行型转换带为主,西部东营地区以叠覆型转换带为主,其间过渡带以趋近型转换带为主。断层转换带多分布在断层的交汇处、拐弯处和末端处,是伸展、走滑构造应力场联合、复合作用的产物。在转换带发现了一批优质储量,与2条断层相关的转换带比与1条断层相关的转换带油气更富集。

Dongxin oilfield is located on the eastern section of central uplift of Dongying Sag in Jiyang Depression, which had been cut by hundreds of faults, is a typical oil trap with complicated fault block. Based on the transfer theory of fault, 11 fault transfer zones are identified, which belong to 4 types (collateral synthetic, collateral convergent, overlapping, and approaching transfer styles). Collateral fault transfer zone is the major style in the eastern Xinzhen area, overlapping fault transfer zone is mainly developed in the western Dongying area, and the central area mainly grows approaching fault transfer style. Fault transfer zones grow on the cross; round and the end of faults generally, are the effect of extensional, strike slip, and inversion structural stress. Several high-quality reserves have been identified in the transfer zones, and the transfer zones are controlled by two faults are richer in hydrocarbon than those in the transfer zones, controlled by one fault.