延长东区上古生界盒8储层特征及综合评价
发布时间：2018-12-26 16:07
【摘要】：研究区位于鄂尔多斯盆地伊陕斜坡东南部的延长县东区,目的层为盒8,根据沉积旋回及辅助标志层自下而上将盒8分为盒8下和盒8上。本次研究是在测井、录井、钻井、试油试采等资料和实验分析资料的基础上,运用现代地质理论和各种处理软件,进行系统的地层对比、沉积相及砂层展布和储层综合地质特征的研究,查明盒8砂岩储层空间发育和分布规律,建立本区盒8储层评价综合分类标,从而对盒8进行综合分类评价。延长东区盒8上和盒8下地层厚度均较稳定,横向变化小,与盒8上相比盒8下地层则较厚;从东西向剖面上来看,地层总体为一个西倾单斜,由西到东地层逐渐抬升,从南北向剖面上来看,北部至中部地层变化相对平缓,南部地区有所抬升,但抬升幅度较东西向小,发育鼻隆构造。三角洲前缘亚相沉积,物源方向来自东北方向,水下分流河道及河口坝主体发育区内砂体厚、规模大、岩性均匀、物性较好,是优质储层发育的主要区带;岩性主要为中粒岩屑砂岩及少量岩屑石英砂岩和石英砂岩;盒8属于特低孔特低渗透储层,其中盒8上物性比盒8下好。粘土矿物有绿泥石、伊利石、高岭石、伊/蒙间层等,以伊利石为主,没有蒙皂石;成岩作用强烈,成岩演化阶段达到晚成岩B期;孔隙类型主要有岩屑溶孔、长石溶孔、粒间孔、晶间孔、粒间溶孔及微裂缝等,以岩屑溶孔与长石溶孔为主;微观结构以细~小孔细喉为主。储层具有较强非均质性,储层厚度及孔、渗受沉积相带控制,具有一定方向性。根据储层评价综合分类标准,将和储层分为Ⅰ、Ⅱ、Ⅲ、Ⅳ共四种类型,分别对应好储层、中等储层、差储层及非储层;盒8上与盒8下均以Ⅲ类和Ⅳ类储层为主。
[Abstract]:The study area is located in the eastern part of Yanchang County in the southeast of Yishan slope in Ordos Basin. The target layer is Box 8. Box 8 is divided into box 8 and box 8 from bottom to top according to sedimentary cycle and auxiliary marker layer. This study is based on the data of logging, drilling, oil testing and production testing and experimental analysis, using modern geological theory and various processing software to carry out systematic stratigraphic correlation. Based on the study of sedimentary facies and sand distribution and the comprehensive geological characteristics of reservoir, the spatial development and distribution law of box 8 sandstone reservoir are found out, and the comprehensive classification standard of reservoir evaluation of box 8 in this area is established, and the comprehensive classification evaluation of box 8 is carried out. In Yanchang Eastern District, the thickness of upper and lower layers of box 8 is stable, the lateral change is small, and the lower layer of box 8 is thicker than that of box 8. Looking from the EW profile, the strata are generally a westward inclination monoclinal, gradually uplifting from the west to the east. From the south to the north profile, the stratigraphic changes from the north to the middle are relatively smooth, and the southern region is uplifted, but the extent of uplift is smaller than that in the east and west. Develop rhinostomy structure. The delta front subfacies deposit, the source direction comes from the northeast direction, the underwater distributary channel and the estuary dam main development area sand body thick, the scale is large, the lithology is uniform, the physical property is good, is the high quality reservoir development main zone; The lithology is mainly medium grain lithic sandstone and a small amount of lithic quartz sandstone and quartz sandstone, and box 8 belongs to very low porosity and low permeability reservoir, in which the physical property of box 8 is better than that of box 8. The clay minerals include chlorite, Illite, kaolinite, Illite / interlayer, etc., with Illite as the main layer and no montmorillonite, the diagenesis is strong, and the diagenetic evolution stage reaches the late diagenetic stage B. The main pore types are lithic solution pore, feldspar pore, intergranular dissolved pore and microfracture, etc. Reservoir has strong heterogeneity, reservoir thickness and pore, permeability is controlled by sedimentary facies, and has certain directionality. According to the comprehensive classification criteria of reservoir evaluation, the reservoirs are divided into four types: type 鈪，
本文编号：2392365
[Abstract]:The study area is located in the eastern part of Yanchang County in the southeast of Yishan slope in Ordos Basin. The target layer is Box 8. Box 8 is divided into box 8 and box 8 from bottom to top according to sedimentary cycle and auxiliary marker layer. This study is based on the data of logging, drilling, oil testing and production testing and experimental analysis, using modern geological theory and various processing software to carry out systematic stratigraphic correlation. Based on the study of sedimentary facies and sand distribution and the comprehensive geological characteristics of reservoir, the spatial development and distribution law of box 8 sandstone reservoir are found out, and the comprehensive classification standard of reservoir evaluation of box 8 in this area is established, and the comprehensive classification evaluation of box 8 is carried out. In Yanchang Eastern District, the thickness of upper and lower layers of box 8 is stable, the lateral change is small, and the lower layer of box 8 is thicker than that of box 8. Looking from the EW profile, the strata are generally a westward inclination monoclinal, gradually uplifting from the west to the east. From the south to the north profile, the stratigraphic changes from the north to the middle are relatively smooth, and the southern region is uplifted, but the extent of uplift is smaller than that in the east and west. Develop rhinostomy structure. The delta front subfacies deposit, the source direction comes from the northeast direction, the underwater distributary channel and the estuary dam main development area sand body thick, the scale is large, the lithology is uniform, the physical property is good, is the high quality reservoir development main zone; The lithology is mainly medium grain lithic sandstone and a small amount of lithic quartz sandstone and quartz sandstone, and box 8 belongs to very low porosity and low permeability reservoir, in which the physical property of box 8 is better than that of box 8. The clay minerals include chlorite, Illite, kaolinite, Illite / interlayer, etc., with Illite as the main layer and no montmorillonite, the diagenesis is strong, and the diagenetic evolution stage reaches the late diagenetic stage B. The main pore types are lithic solution pore, feldspar pore, intergranular dissolved pore and microfracture, etc. Reservoir has strong heterogeneity, reservoir thickness and pore, permeability is controlled by sedimentary facies, and has certain directionality. According to the comprehensive classification criteria of reservoir evaluation, the reservoirs are divided into four types: type 鈪，
本文编号：2392365
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