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三肇地区扶余油层致密油形成条件及分布规律

投稿网址:https://www.doczj.com/doc/8f16003002.html, 三肇地区扶余油层致密油形成条件及分布规律

王松喜

(大庆油田有限责任公司海拉尔石油勘探开发指挥部,黑龙江大庆021000)

摘要:综合利用地质、钻井、测井及地球化学等方面资料,系统分析了松辽盆地三肇地区扶余油层致密油的形成条件和分布规律。结果表明,研究区具备形成致密油的4个有利条件:原油性质好,可流动性强,致密油形成条件优越;广覆式大面积分布的优质烃源岩与致密储层紧邻,为致密油形成提供了充足的油源基础;大面积广泛分布的致密储层为致密油藏形成提供了有效储集空间;地层超压与油源断层有机匹配,为致密油向下运移提供了充足的动力。最后指出,三肇地区扶余油层致密油具有大面积(准)连续分布特征,含油非均质性极强,存在局部“甜点”富集区,河道砂体控制致密油局部“甜点”富集区。

关键词:松辽盆地;三肇地区;非常规油气;致密油;形成条件;分布规律

中图分类号:TE122.2文献标志码:A doi:10.3969/j.issn.1006-396X.2018.06.008

Formation and Distribution Rule of Tight Oil in Fuyu Oil Layer of the Sanzhao

Area

Wang Songxi

(Hailaer Oil Exploration and Exploitation Headquarters,Daqing Oilfield Company Ltd.,Daqing Heilongjiang021000,

China)

Abstract:Bases on the data of geology,drilling,logging and geochemistry,the formation conditions and distribution rules of tight oil reservoir in Fuyu oil layer of Sanzhap area were systematically analyzed.The results show that the study area has four advantages for tight oil accumulation.The crude oil is of good quality and strong fluidity,and the formation condition of the dense oil is superior.High quality hydrocarbon source rocks with wide coverage and large area distribution are close to the tight reservoirs,which provide sufficient oil source for the formation of tight oil reservoir.The compact reservoirs with wide area distribution provide effective reservoir space for the formation of compact oil reservoirs.The formation overpressure matches with the oil source fault,which provides sufficient power for the oil migration.At last,it is pointed out that the tight oil in Fuyu oil reservoir in Sanzhao area has the characteristics of large area(quasi)continuous distribution,strong oil heterogeneity.The channel sand body controls the local sweet area of the tight oil.

Keywords:Songliao basin;Sanzhao area;Unconventional oil and gas;Tight oil;Formation condition;Distribution rule

致密油是富集于致密砂岩或碳酸盐岩等储集体中,未经过大规模和长距离运移所形成的油气聚集[1-3]。致密油资源相当丰富,与页岩气并举,是非常规油气勘探领域的热点[4-6]。目前,全球范围已有诸多致密油成功勘探的案例,如北美地区Williston 盆地、Maverick盆地和Fort Worth等盆地[7-9]。近年来,中国致密油勘探也取得显著成效,在鄂尔多斯盆地、吐哈盆地、准噶尔盆地、四川盆地、塔里木盆地及松辽盆地均具备形成致密油规模储量和有效开发的条件,已形成良好的勘探局面[10-12]。

然而,松辽盆地三肇地区扶余油层致密油的勘探程度与地质认识程度相对低,关于致密油形成条件及分布规律认识薄弱,制约了致密油领域的勘探与开发。因此,笔者综合利用地质、钻井、测井及地球化学等方面资料,对松辽盆地三肇地区扶余油层致密油形成条件进行了深入研究,进而分析了扶余

第31卷第6期2018年12月Vol.31No.6

Dec.2018

文章编号:1006-396X(2018)06-0046-07石油化工高等学校学报

JOURNAL OF PETROCHEMICAL UNIVERSITIES

收稿日期:2018-03-09修回日期:2018-04-10

基金项目:中国石油天然气股份公司重大科技专项(2011E-1201)。

作者简介:王松喜(1982-),男,工程师,从事油藏描述及精细地质方面的研究;E-mail:xhz14789@https://www.doczj.com/doc/8f16003002.html,。万方数据

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