Gaoqing Fault North Shahejie Clastic Rocks And Igneous Reservoir Geology Of Kongdian

On the base of studying predecessors research and the geology seismic, drill and geochemical datum, combed with 3D seismic exploitation, well logging controlling inversion, well logging multi-function exploitation, we use reservoir description, oil-gas system and dynamic of pool formation and oil-gas integrate geologic analysis and quantitative analog technology. Oil-gas geological conditions and oil-gas development prospect were analyzed comprehensibly and evaluated systematically in the northern area of Gaoqing fault belt in Dongying sag. The thesis is composed of three parts: reservoir description, the study of reservoir formed conditions and hydrocarbon accumulation laws, oil-gas resource and development prospect evaluation.Reservoir study:The elastic rock of Es4 and volcanic rock of Ek were studied separately. Because they are different in lithite and sedimentary features. The different studying ways were adopted in the research. According to core observe and cutting log datum, the reservoirs of Es4 are separated into two classes: sandstone rock reservoir and carbonate reservoir. Sandstone reservoir mainly lie in south and east of studying district and carbonate reservoir is made of limestone, dolomite reservoir etc. In the west and north area, Es4 was not controlled efficiently. By drilling, we forecast reservoirs of E4s with well logging controlling inversion and studying the distribution of reservoirs. Volcanic rock of Ek lie in middle and upper sides, basalt appear patch host inter-creation. Major mineral is plagioclasite, augite complete alteration, inferred augite and secondary mineral are saponite Chlorite dolomite. According to volcanic gas cavity and fracture extent of development and fill, we separate basalt into ganister basalt and gas cavity basalt. They appear alternative in volcanic of Ek3. According to lithologic of eruptive rock. Structural feature, thickness change and electronic. Reservoir space development extent differentially. Volcano slop faces, volcanic reservoir controlling factors mainly are fracture weathering crust and lithe faces.(2) Pool-formation conditions and oil-gas accumulation law research:Gaoqing great fault in Gaoqing fault belt boundary active for long time and form unique sedimentary types and structure characteristic reservoir conditions. Abundant oil recourse, good reservoir and advantage source-reservoir cap rock assemblage are necessary conditions. By analysing pool-formation basic conditions ,good reservoir lie in the northern area. Oil-gas formed in Ng2-3-Nm; E4-uEs3m-1 was migrated into delta of Es3 and Es2 by initial migration, and migrate to Gaoqing fault belt against deformation up dip direction top; due to lack big seal structure oil-gas can not be accumulated. Vertical direction accumulation is principal, oil-gas migrate into up wall of reservoir of Ek and Es and migrate against up dip direction top and trapped by Eg button unconformity and fault. Oil-gas mainly accumulate in fault boundary near with great fault abundant oil bed, thick oil bed, oil bed decrease in far from fault's west, Petroleum-bear weak were main characteristic. As Volcanic, fault near fracture and reservoir space develop abundance pore and cavern is easy to form high production fracture reservoir. From oil-gas distribution observed, due to oil resource lacking in the northern district, block can not completely be filled oil-gas mainly accumulate in the southern degradation line near. Distance of slop belt was mainly controlling factors of oil-gas abundance accumulation.Oil-gas resource and development prospect evaluation:on the base of reservoir and pool-deformation geological conditions of analyzing and studying, according to trap drilling controlling extent, in the northern area, petroleum resource quantity and develop went prospect were evaluated by probable reserves and inferred reserves respective. By calculating, estimated reserves are 1813 thousand tons and inferred reserves are 1750 thousand tons. Petroleum-bearing area without well controlled layout exploratory in order to ascertain petroleum quantity and the area with well-controlled layout development rolling well and development well.In all elastic rock of E4sand volcanic rock of Ek in fault belt the northern area. Possess to pool-deformation basic oil-gad geological condition and develop various petroleum exploration and develop various petroleum-bearing trap and possess better petroleum exploration and development respect.