Boiling process of low temperature formation water in petroleum system, Qaidam Basin

FOLLOWING the study of Roedder et al., boiling fluid inclusions are identified in oil reservoir ofQaidam Basin. This paper reports the general characteristics of the boiling fluid inclusions, analyzes theconditions for the formation water to boil at low temperature, and discusses the relation between the boiling process and the oil/gas accumulation. 1 General features Boiling fluid inclusions are minute records of the immiscibility process of subterranean hydrothermalfluids, which are generally composed of different types trapped simultaneously. They are observed mostlyin magmatic hydrothermal mineral deposits. In sedimentary basins, the boiling process was only found inMVT. The discovery of boiling fluid inclusions in Qaidam Basin is of great significance to

柴西南区岩性油藏的形成过程

柴西南区岩性油藏勘探潜力较大,但是对岩性油藏形成过程的研究十分薄弱。在分析柴西南区主力烃源岩生、排烃史的基础上,根据储层显微荧光及流体包裹体均一温度特征,结合对岩性圈闭形成期次分析,深入分析了岩性油气藏形成过程。研究表明,柴西南区有两次主要的油气充注期:中新世中期和上新世末期;其岩性圈闭形成具有相对早期性和多期性,其主要形成期在渐新世末期和上新世末期。柴西南区岩性油气藏形成过程划分为两个阶段:成藏期及保存—破坏期。