论文部分内容阅读
利用辽东湾地区70余口探井实测的静温静压数据以及地震地层压力预测的数据,对该地区地温场、地压场、地温—地压系统特征进行剖析,并探讨了它们与油气分布的关系。该地区目前已发现的大中型油气田多位于辽西低凸起高地温梯度区。辽东湾发育深、浅2个超压体系,浅层超压体系主要对应东三段,深层超压体系主要对应沙三段,油气藏主要位于超压区的边缘或常压区。深、浅2个超压体系在北、中、南部地区发育特征的差异控制油气分布层位的差异性,北部地区沙一、二段是最主要的含油层系,中、南部地区则以东二段为最主要的含油层系。辽东湾发育高压型复式温压系统,上下2套温压系统能量差较大,油气垂向运移动力强,趋向于在温压系统分界附近富集成藏。
Based on the data of static temperature and static pressure measured by more than 70 wells in Liaodong Bay and the prediction data of seismic formation pressure, the characteristics of geotemperature field, pressure field and geotemperature-pressure system in this area are analyzed and discussed. relationship. The large and medium-sized oil and gas fields that have been found in the area are mostly located in the low-elevation and geothermal gradient area in western Liaoning. There are deep and shallow overpressure systems in Liaodong Bay. The shallow overpressure system mainly corresponds to the East Third Member, and the deep overpressure system mainly corresponds to the third sand segment. The oil and gas reservoirs are mainly located at the edge of the overpressure zone or the atmospheric pressure zone. The differences between the deep and shallow overpressure systems in the north, middle and south regions control the differences in hydrocarbon distribution layers. The first and second sections of the northern part are the most important oil-bearing strata and the middle and southern parts are eastward Sec is the most important oil-bearing formation. Liaodong Bay development of high-pressure multi-type temperature system, the upper and lower temperature and pressure system, two sets of large energy difference, strong vertical migration of oil and gas, tend to enrich the reservoir in the vicinity of the temperature and pressure system boundaries.