苏里格地区天然气勘探新进展

苏里格地区位于鄂尔多斯盆地西北部，勘探面积约4×10⁴ km²。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230×10⁸ m³。

New development in natural gas exploration of the Sulige Gas Fields

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 ...