摘要
鄂尔多斯盆地富县探区长2油藏为典型的构造—岩性油藏。随着开发的深入,研究区长2已开发区块产量下降快,尚无接替储量成突出问题,与此同时,长2油藏的优势在于:埋深浅、物性好、产量稳定,成藏条件优越,可以"当年发现、当年评价、当年建产"。为改善目前现状,需对该区长2油藏的主控因素作进一步的认识,为继续寻找油气富集有利区提供一定的理论依据。通过对研究区沉积、构造、储层、盖层以及成岩作用等方面的研究,分析总结了研究区长2油藏的分布特征及富集规律。结果表明:沉积微相、物性条件及构造特征对研究区长2油藏的富集起着重要的作用;盖层的遮挡及封盖为油气提供了良好的保存条件;裂缝的发育及成岩作用一定程度上也改善了储层的储集性能。
Chang-2 formation of Fuxian oilfield in Ordos Basin belongs to typical structure-lithologic reservoir. Due to the deeply development, the production declines fast, but there is no replaced reserve. Having the advantages of shallow buried depth, good physical property, stable production and good reservoir formation condition, Chang-2 formation can be found, be evaluated and go into production in the year. In order to improve present situation, it is necessary to further understand the main control factors of the reservoir, which can provide some theoretical basis for keep searching for favorable areas of oil and gas enrichment. Through researching sedimentation, structure, reservoir, capping formation and diagenesis, this paper analyses and concludes the distribution characteristics and hydrocarbon accumulation regulation of Chang-2 formation. The results show that, the characteristics of sedimentary microfacies, physical conditions and structural features play an important role in hydrocarbon accumulation of Chang-2 formation, and in addition, the shielding and seal capping of capping formation provide good preservation condition for oil and gas storage, furthermore, the development of fractures and diagenesis improve reservoir properties to some extent.
出处
《油气藏评价与开发》
CSCD
2017年第6期8-13,共6页
Petroleum Reservoir Evaluation and Development
基金
陕西省自然科学基金"连续型油藏砂岩输导体系与石油运移时效性探讨"(2013JM5006)
关键词
富县探区
长2油层组
成藏主控因素
沉积微相
构造特征
Fuxian oilfield, Chang-2 formation, main control factors of reservoir forming, sedimentary microfacies, structural feature
