三塘湖油田马北区块油藏地质特征研究
发布时间：2018-07-24 09:21
【摘要】：三塘湖盆地属阿尔泰山山系和天山山系之间的叠合、改造型山间盆地,呈北西-南东向狭长状分布,面积约2.3×104km2。根据构造、沉积组合等特征,将盆地分为东北冲断隆起带、中央坳陷带和西南逆冲推覆带三个一级构造单元。马北区块位于三塘湖油田牛圈湖区块的东部、牛东油田的西部,构造位置位于三塘湖盆地条山隆起带前缘的牛圈湖—牛东构造带上。马北区块由湖219井和马46井两个区块组成。总含油面积12.85km2,探明地质储量1230×104t。目的层为侏罗系中统西山窑组,油藏埋深湖219井区为1200~1800m,马46井区为769~1172m。储层沉积类型为辫状河三角洲前缘水下分流河道沉积,储层岩性主要为长石岩屑砂岩,储层物性差,平均孔隙度15.5%,渗透率9.45×10-3μm2,非均质性强。油层单层厚度为2~12m,最厚17.6m,油藏类型属层状构造岩性油藏。油藏温度、压力低,温度梯度2.3℃/100m,压力系数0.71~0.83;马北区块湖219井、马46井区原油属稠油,粘度67~2443mPa·s。此次研究首先对该区块进行了目标层位的地震解释和储层反演,从而对构造进行了重新认识并且对目的层进行了小层划分,并且进行了目的层段的四性关系研究,并重新进行了储量计算。通过对油藏特征的初步认识,进行了水平井先导试验,通过水平井地质导向及目的层取芯等手段获取了目的层的重要资料,进行了地质特征再认识及储量复算。并且进行了马平23-35井和马试5井蒸汽吞吐试验,得出马46井区储层渗透率低,吸汽能力差,含油饱和度低,可动油数量有限的结论。
[Abstract]:The Santanghu basin belongs to the overlap between the Altai and Tianshan mountains. The reformed intermountain basin is distributed in a long, narrow and narrow direction from the north to the south with an area of about 2.3 脳 10 ~ 4km ~ (2). According to the characteristics of structure and sedimentary assemblage, the basin is divided into three first-order tectonic units: the thrust uplift belt in northeast China, the central depression belt and the southwest thrust nappe belt. The Mabei block is located in the eastern part of Niuquan Lake block in Santanghu Oilfield and in the west of Niudong Oilfield. The tectonic location is located in the Niuquanhu-Niudong structural belt in the front edge of Tiaoshan uplift belt in Santanghu Basin. Mabei block is composed of two blocks, Hu 219 well and Ma 46 well. The total oil-bearing area is 12.85 km2, and the proved geological reserves are 1230 脳 10 ~ 4 t. The target layer is the Xishanyao formation of the Jurassic Middle Series, the buried deep lake 219 well area is 1200 ~ 1800m, and the Ma 46 well area is 769 ~ 1172m. Reservoir sedimentary type is braided river delta front underwater distributary channel deposition, reservoir lithology is mainly feldspar lithic sandstone, reservoir physical property is poor, average porosity is 15.5am, permeability is 9.45 脳 10 ~ (-3) 渭 m ~ (2), heterogeneity is strong. The single layer thickness of oil layer is 2 ~ 12 m and the thickest is 17.6 m. The reservoir type belongs to stratified structural lithologic reservoir. The reservoir temperature and pressure are low, the temperature gradient is 2.3 鈩，
本文编号：2140922
[Abstract]:The Santanghu basin belongs to the overlap between the Altai and Tianshan mountains. The reformed intermountain basin is distributed in a long, narrow and narrow direction from the north to the south with an area of about 2.3 脳 10 ~ 4km ~ (2). According to the characteristics of structure and sedimentary assemblage, the basin is divided into three first-order tectonic units: the thrust uplift belt in northeast China, the central depression belt and the southwest thrust nappe belt. The Mabei block is located in the eastern part of Niuquan Lake block in Santanghu Oilfield and in the west of Niudong Oilfield. The tectonic location is located in the Niuquanhu-Niudong structural belt in the front edge of Tiaoshan uplift belt in Santanghu Basin. Mabei block is composed of two blocks, Hu 219 well and Ma 46 well. The total oil-bearing area is 12.85 km2, and the proved geological reserves are 1230 脳 10 ~ 4 t. The target layer is the Xishanyao formation of the Jurassic Middle Series, the buried deep lake 219 well area is 1200 ~ 1800m, and the Ma 46 well area is 769 ~ 1172m. Reservoir sedimentary type is braided river delta front underwater distributary channel deposition, reservoir lithology is mainly feldspar lithic sandstone, reservoir physical property is poor, average porosity is 15.5am, permeability is 9.45 脳 10 ~ (-3) 渭 m ~ (2), heterogeneity is strong. The single layer thickness of oil layer is 2 ~ 12 m and the thickest is 17.6 m. The reservoir type belongs to stratified structural lithologic reservoir. The reservoir temperature and pressure are low, the temperature gradient is 2.3 鈩，
本文编号：2140922
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