通王断裂带沙河街组油气成藏主控因素研究

A study on the controlling factors of petroleum accumulation in Shahejie Formation in Tong-Wang fault belt

王利

Wang Li

中国石油化工股份有限公司胜利油田分公司现河采油厂地质所, 山东东营 257068

Xianhe Oil Production Plant of SINOPEC Shengli Oilfield Company, Dongying 257000

通王断裂带地区位于济阳坳陷东营凹陷南斜坡东部,沙河街组是本区的主要含油层系。通过烃源岩分析、储集层类型划分、孔隙流体动力场的描述、优质输导体系类型及断裂构造特征的研究,认为牛庄洼陷烃源岩主要为沙四上和沙三段深湖相-半深湖相暗色泥岩、油页岩,油气以生油洼陷为中心,呈环状或半环状分布;沙三段大型三角洲相储集砂体、沙四段中上部的滨浅湖近岸砂坝、远岸砂坝和席状砂岩储层是主要储集层类型;砂体-断层类输导体系是本区优质输导体系,牛庄洼陷北部发育的高压型复式温压系统,使油气顺着断层、砂体向南部通王断裂带常压常温和常压高温区运移。通王断裂带的油气藏主要是受断裂控制的构造油气藏,王家岗油田往西的中浅层是断层类油藏的有利地区,王家岗地区北部和陈官庄地区的西北部,是沙三段隐蔽油气藏以及断层-岩性复合型油气藏勘探的有利勘探地区。

Tong-Wang fault belt is located in the east of the south slope of Dongying Sag, Jiyang Depression.Shahejie Format ion is the major oil-bearing layer in this area.Through the research on hydrocarbon source rocks, reservoir rocks, pore fluid dynamic field, high quality transportation system and the fracture characteristics, etc., it is determined that the hydrocarbon source rocks in Niuzhuang Sag are mainly subdeep lacustrine-deep lacustrine dark mudstone and oil shale of Es4s and Es3.The dist ribution of oil and gas is circular or semi-circular with oil-generation subsag as the center;major types of reservoir in this area are the large delta reservoir sandbodies of Es3 and the lit toral-shallow lacustrine nearshore sand bar, offshore sand bar and sheet sandstone of Es4s and Es4z.Sand-fault transportation system is high quality transportation system in this area.Oil and gas moves along fault and sand body from north to Tong-Wang fault belt in the south where normal pressure with normal temperature and normal pressure with high-temperature exists.Oil-gas reservoirs in Tong-Wang fault belt are structural reservoirs which cont rolled by faults.The middle-shallow format ions of western Wang jiagang oil field are favorable areas for fault reservoirs and northern Wangjiagang region and the northwestward Chenguanzhuang region are favorable exploration areas for subtle reservoirs and fault-lithologic combinat ion reservoirs.

https://doi.org/10.3969/j.issn.1008-2336.2010.01.014