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纯梁地区位于东营凹陷西南部的博兴洼陷 ,1 965年至 1 998年已发现下第三系的 9个油田和 1个气田 ,但油气探明程度仍低于 50 % ,具有继续滚动勘探开发的资源基础。纯梁地区具有典型的复式环状平面油气分布规律和纵向“三段式”压力分布规律 ,浅层和中深层形成“砂储泥盖”式常压油气藏和异常高压油藏 ,深层发育异常高压特种油气藏。所谓特种油气藏位于“三段式”压力剖面最下部 ,由“砂泥孔缝等压储渗体”与上覆泥岩盖层及侧向遮挡条件配合而形成特殊圈闭条件。认为纯梁地区的石村断裂带和博兴断裂带附近以及洼陷内是近期勘探浅—中深层小型牵引构造类油气藏和岩性 构造及岩性 地层类油气藏的重要潜力区 ;博兴洼陷西北部高 7井区较深层存在高含油气丰度的特种油气藏 ,博兴洼陷西北部是勘探后期扩大勘探领域、寻找新类型油气藏的重要潜力区。图 4表 2参 2(王孝陵摘 )
The Chunliang area is located in the Boxing depression in the southwestern part of Dongying Sag. Nine oilfields and one gas field in the Lower Tertiary were discovered from 1965 to 1998, but the degree of oil and gas exploration is still below 50%, with continuous rolling Resource base for exploration and development. The pure girder area has the typical double annular distribution of oil and gas and the longitudinal “three-stage” pressure distribution. The sand-mud cover type atmospheric reservoirs and abnormal high-pressure reservoirs are formed in the shallow and middle depths, High pressure special reservoir. The so-called special oil and gas reservoirs are located at the lowest part of the “three-stage” pressure profile, and special trap conditions are formed by the combination of “sand and mud pore pressure isobasic reservoir” with overlying mudstone caprock and lateral covering conditions. It is considered that the Shicun fault zone and the Boxing fault zone in the Chunliang area and the subsidence areas are important potential areas for the exploration of shallow-middle-deep small traction structural reservoirs and lithologic structures and lithologic stratigraphic reservoirs in recent years. There are special oil and gas reservoirs with high oil and gas abundance in the deeper area in the northwest of Block 7, and the northwestern part of Boxing Sag is an important potential area in the exploration and exploration of new types of reservoirs in the late exploration. Figure 4 Table 2 Reference 2 (Wang Xiaoling Abstract)