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天然气成藏模式与勘探方法──以川西天然气藏为例
石油与天然气地质
2000年 21卷 第No.2期
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Title
POOL-FORMING MODELS AND EXPLORATION METHOD OF NATURAL GAS——TAKE WEST SICHUAN GAS POOLS AS AN EXAMPLE
摘要
天然气与石油的成藏机理差异较大,因此不能盲目套用石油的成藏机理,研究天然气。“分散气储,超压运移,储集体成藏,多级补给”是天然气成藏的普遍模式。在天然气勘探中,尤其应重视储集体的发育情况,扭张性裂隙发育区易形成天然气储集体。由于天然气主要分布于储集体中,所以在钻孔设计上应采用多侧向水平井,施工中采用欠平衡钻进。
Abstract
Gas pool-forming mechanism differs greatly from oil pool-forming mechanism.Separate reservation,superpressure migration,reservoir formed pool and multi grade supply is the popular gas pool-forming model.Transtensional fracture developed area is favourable for the formation of gas reservoirs.To explore gas resources,one should adopt multi lateral horizontal well in drilling-planning and unbalance drilling in operation.
关键词：
天然气;
成藏模式;
储集体;
水平井;
Keywords:
natural gas;
pool-forming moedl;
reservoir;
horizental well;
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