摘要
鄂尔多斯盆地东部神木地区上石盒子组、石千峰组频繁的含气显示逐渐引起勘探家的重视。从区域成藏地质条件分析入手,运用流体势、包裹体分析、同位素分析、超压异常计算及构造分析等研究方法,研究了盆地东部地区浅层天然气的沉积、储层等基本成藏地质条件,并建立了上石盒子组、石千峰组砂岩气藏的两阶段成藏模式:早白垩世末形成的山西组、下石盒子组早期高压气藏阶段;晚白垩世末形成石千峰组浅层气藏阶段,并在综合评价的基础上得出神木地区神5井—榆22井区是浅层天然气运聚的有利地区,具有较好的勘探前景,为该地区天然气勘探部署提供了依据。
The frequently-appearing gas shows in Shihezi Formation and Shiqianfeng Formation at Shenmu region in East E'erduosi Basin have brought to the explorationists' attention. Proceeding from the regional reservoiring geological conditions and by use of these methods as fluid potential analysis, fluid inclusion analysis, isotope analysis, overpressure anomaly calculation and tectonic analysis, etc., the authors investigated the basic geological conditions (including sedimentation and reservoir) of the shallow gas in the east part of the basin, and established a two-stage reservoiring pattern for the Shihezi Formation and Shiqianfeng Formation sandstone gas reservoirs, i. e. the Shanxi Formation and Lower Shihezi Formation early high-pressure gas reservoir stage formed at the end of Early Cretaceous and the Shiqianfeng Formation Shallow gas reservoir stage formed at the end of Late Cretaceous. On the basis of comprehensive evaluation, it was concluded that the area of well Shen-5 - well Yu-22 at the Shenmu region is of good prospects for gas exploration, being favourable to shallow gas being accumulated here, thus providing a basis for deploying gas exploration at the region.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2005年第4期12-13,共2页
Natural Gas Industry
