【摘要】 苏里格地区位于鄂尔多斯盆地西北部,勘探面积约4×104km2。该区地表条件复杂、地震信噪比低,储层岩性复杂、非均质性较强,气层有效厚度较薄、单井产量低,勘探难度较大。近年来,中国石油长庆油田公司通过深化地质综合研究及勘探技术攻关,明确了苏里格气田有效储层分布和天然气富集规律,创新形成了地震有效储层预测、复杂气层测井评价、致密砂岩储层改造等先进适用的勘探技术。勘探目标从砂体预测转向有效储层与含气性预测,通过整体勘探,探明了我国第一个超万亿立方米储量的整装大气田,探明天然气地质储量规模达2.85×1012m3,同时在苏里格南部地区形成了新的资源接替区。预计2015年以前,苏里格地区的天然气储量规模可超过3.5×1012m3,天然气年产量将达到230×108m3。更多还原

【Abstract】 The Sulige is situated in the northwest of the Ordos Basin with an exploration area of 40,000 km2,where,under complicated surface conditions,a low signal-to-noise ratio is obtained in seismic data acquisition,the complex lithology reservoirs are of heterogeneous intensity,the effective thickness of gas pay zones is rather small,and per-well production is quite low.All these above will result in the great difficulty in this area’s gas exploration.In view of this,the PetroChina Changqing Oilfield Company has made deep investigation into integrated geological research and has developed many exploration techniques.As a result,effective gas reservoir distribution and gas enrichment rules in the Sulige Gas Field are clarified,and advanced and practical exploration techniques are formed including the seismic forecast on effective gas reservoirs,the logging evaluation on the complicated gas pay zones,the stimulation measures of dense sandstone gas reservoirs,and so on.Moreover,this company’s exploration target has turned its forecast from the sand body to effective gas reservoirs and gas-bearing properties.Through overall exploration in the Sulige area,a first mono-block gas field with the reserves of more than 10 trillion cubic meters has been explored,where the original gas in place is up to 2.85 trillion cubic meters,and the southern Sulige part has become a new gas resource turn-over zone.It is predicted that by 2015,the accumulated proved gas reserves in the Sulige area will be over 3.5 trillion cubic meters and the annual gas production there will be up to 23 billion cubic meters.更多还原