【摘要】 苏里格地区位于鄂尔多斯盆地西北部,勘探面积约40 000km2,主要发育低渗、低压、低丰度的大型致密气藏。经过10余年的勘探,发现了目前我国最大的天然气田———苏里格气田,探明天然气地质储量2.85×1012 m3。总结其成藏地质条件和勘探技术发现,平缓的构造与烃源岩广覆式分布、稳定的沉积与储集体大面积分布、建设性成岩作用与相对高渗储层分布、天然气近距离运聚成藏与高的聚集效率等因素是苏里格大型致密气藏形成的主要控制因素;全数字地震勘探、复杂气层测井精细评价、致密砂岩储层改造等技术是苏里格大型致密气藏勘探开发的关键技术。更多还原

【Abstract】 Sulige region is located in the northwest of Ordos Basin with the exploration area of 40 000 km2.In the region,large tight gas reservoir with low permeability,low pressure and low abundance is mainly developed.Through explorations for more than 10 years,current China’s largest natural gas field,Sulige gas field,has been discovered,with proven geologic reserve of natural gas 2.85×1012m3.In summary of geological conditions for hydrocarbon accumulation and exploration technology,it can be found that the primary control factors to form such a large gas reservoir include: gentle structure and excessive distribution of hydrocarbon source rock,stable deposition and large-area distribution of sand reservoirs,constructive diagenesis and distribution of high permeability reservoirs,natural gas proximal migration and high accumulation efficiency.And full-digital seismic exploration,fine logging evaluation of complex gas reservoir,transformation of tight sandstone reservoir are key technologies for exploration and development of large-scale tight gas reservoir in Sulige.更多还原