【摘要】 准噶尔盆地西缘车排子地区石炭系火成岩勘探存在较多难题。其石炭系火成岩储层地震反射杂乱,预测火成岩有利储层分布及裂缝有利发育区的难度较大。根据钻井和地震资料,利用重磁电预测技术和地震预测技术等对车排子地区石炭系火成岩的烃源岩条件、油气成藏条件及勘探关键技术等进行研究,结果表明,研究区自海西期形成以来长期继承性隆起,是油气的有利运移指向区;昌吉凹陷和四棵树凹陷的油气通过断层和裂缝运移至石炭系火成岩裂缝—孔隙型储层中聚集成藏;研究区石炭系火成岩具有生烃条件,可以提供油源形成自生自储型油气藏。车排子地区石炭系发育巨厚火成岩,并已获得工业油气流;其火成岩储层的含油气性主要与裂缝发育程度成正相关。根据研究区石炭系火成岩储层、断裂破碎带及裂缝分布的预测结果,已成功钻探32口井,其中11口井获得工业油气流,已上报控制石油地质储量6 101×104t。更多还原

【Abstract】 The difficulty of Carboniferous igneous exploration in the Chepaizi area which is located in the west edge of Junggar Basin was studied. The seismic reflection of reservoir rock is clutter,so it is difficult to predict the favorable reservoir and crack areas. According to the drilling and seismic data,the gravity,magnetic,electric data and the seismic prediction technology were used to study hydrocarbon source rock conditions,hydrocarbon accumulation conditions and the key exploration technologies of the igneous rocks. The results showed that the study area was uplifted successively in a long term since it was formed during the Hercynian,and it is favorable for hydrocarbon migration. The oil and gas from Changji sag and Sikeshu sag migrated into fractured-porous reservoirs of igneous rock through faults and fractures and then accumulated there. The igneous rocks should have hydrocarbon generating conditions,which maybe provide oil source and was able to form a self-sourced and self-reservoired oil and gas pool. The industrial oil and gas obtained from the thick igneous rock developed in Carboniferous in the Chepaizi area. The oil-bearing property of the igneous rock reservoir is mainly correlated with the degree of fractures development. According to the predicted results of igneous rock reservoir,fracture zone and crack distribution,32 wells were drilled successfully,among which 11 wells were drilled at industrial oil and gas. The controlled geological oil reserves were reported to be 6 101×104t.更多还原