松辽盆地北部宋站-尚家地区断裂发育特征及其对油气成藏的控制作用  

DEVELOPMENT CHARACTERISTICS OF FAULTS AND THEIR CONTROL TO HYDROCARBON ACCUMULATION IN THE SONGZHAN-SHANGJIA AREA,NORTHERN SONG-LIAO BASIN

作　　者：林铁锋[1] 施立志[2] 王卓卓[2] 马永义[2] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大地构造与成矿学》2008年第2期165-170,共6页Geotectonica et Metallogenia

基　　金：国家科技攻关项目(编号2003BA613-01-02)资助的部分成果.

摘　　要：根据研究区基础地质资料,结合地震解释,研究了工区断裂的分布特征,发现断裂在平面上呈条带状分布。深、浅层展布方向具有一致性,主要以近南北向(尚家工区内)和北西向(宋站工区内)断层为主,近东西向断层最少;纵向上,发现断裂在T2(泉头组顶部)层发育最多,T3(登娄库组顶部)层最少。研究认为本区断裂发育分为早期、中期、晚期以及长期继承性发育这四个时期,其中以中、晚期断裂最为发育。分析表明本区断裂对油气藏的形成明显具有控制作用,控制了本区局部构造(断块)的发育,形成一系列构造油气藏、构造-岩性油气藏。断裂在活动时期可以直接作为油气运移的输导体,为油气的运移提供良好的时空配置;另一方面,断裂在封闭时期可以对储层形成侧向封堵,对油气起到了很好的保存作用。本文对研究区大量地震剖面进行了对比分析,发现由于反向正断层的侧向封堵作用,有利于该区油气的保存,对油气成藏明显具有控制作用。The geological data and earthquake interpretation in the studied area shows faults are banded on plane from the depth to surface. The direction is unanimous, dominant in near-SN （Shangjia work area） and NW （Song-zhan work area）, the near-EW-trending faults are the least. Most faults occur in the T2 （the top of the Quantou Formation ） and few faults in the T3 （the top of the Denglouku Formation）. The result displays that forming periods of faults had four types： earlier, middle, later and long-term, the middle and later faults are predominant. Synthetic analysis shows faults in the work area controlled the formation of hydrocarbon reservoir and fault blocks, forming a series of structural and structural-lithological reservoirs. These faults can become migration pathways during the mobilized period. On the other hand, faults play a role to laterally close the reservoirs and conserve hydrocarbon. By comparing and analysing seismic cross-sections, we suggest the lateral seal of reverse normal faults is good to conserve oil and gas of the studied area, hence obviously controls hydrocarbon formation.

关 键 词：断裂 反向正断层 油气成藏 松辽盆地北部 

分 类 号：TE121.2[石油与天然气工程—油气勘探] TE132.1