GS油田雷11块莲花油层分层开发研究与应用

发布时间：2018-06-17 11:37

本文选题：雷11块 + 精细油藏描述　；参考：《东北石油大学》2017年硕士论文

【摘要】：GS油田雷11块位于辽河断陷西部凹陷西斜坡北端,属复杂断块低阻底水稀油油藏,其主要开发目的层为下第三系沙河街组沙三下亚段莲花油层,含油面积2.42km2,石油地质储量385×104t,可采储量152.46×104t,标定采收率39.6%。区块自1988年投入开发以来,主要通过一套井网合采合注的方式进行开采,不能充分动用各套储层剩余油潜能,导致区块底水锥进日益严重,开发效果差,层间、层内矛盾突出,产量规模持续递减。本次研究从精细油藏描述入手,落实了区块的构造特征、沉积微相展布特征、储层特征及石油地质储量,认识到目的层莲花油层的构造形态主要为断鼻构造和断背斜构造,是一套淡水湖深水环境下的扇三角洲沉积,储层以砂砾岩为主,平均孔隙度为19.4%,平均渗透率为125.02mD,为中孔中渗油藏。在此基础上,本次研究针对区块特点,纵向上细分储层单元,平面上实施分层开发开采;调整了开发井网的组合方式,优化了分层注采参数和水平井部署参数。自2011年分层开发先导试验以来,先后部署新井45口,其中直井29口,水平井16口,目前已投产41口,区块产量呈现逐年上升趋势,开发指标得到显著提升,日产油量由分层开发前的144t提高220t;采油速度由0.85%升至1.15%,新建原油产能8.1×104t。近几年与产能建设同步加强完善直井注采井网和水平井注采井网,新增水驱控制储量28×104t,水驱储量控制程度由50.5%提高至目前80%。
[Abstract]:GS oilfield Lai11 is located at the northern end of the western slope of the western depression of Liaohe fault depression. It belongs to the complex fault block low resistivity bottom water oil reservoir. Its main development target is the Lianhua oil reservoir of the Lower Tertiary Shahejie formation, the lower part of the Shahejie formation. The oil-bearing area is 2.42 km2, the petroleum geological reserve is 385 脳 10 ~ 4 t, the recoverable reserve is 152.46 脳 10 ~ 4 t, and the oil recovery is 39.6%. Since it was put into development in 1988, the block has been exploited mainly by a set of well pattern combined production and injection, and the remaining oil potential of each set of reservoir can not be fully utilized. As a result, the bottom water coning into the block is becoming more and more serious, the development effect is poor, and the contradiction between layers and layers is prominent. The scale of production continues to decline. Starting with the fine reservoir description, this study has carried out the structural characteristics, sedimentary microfacies distribution, reservoir characteristics and petroleum geological reserves of the block. It is recognized that the structural form of the Lianhua oil layer in the target layer is mainly fault-nose structure and fault-backed oblique structure. It is a fan delta deposit in the deep water environment of freshwater lake. The reservoir is mainly sandy gravel with an average porosity of 19.4mm and an average permeability of 125.02mD. it is a mesoporous and meso-permeable reservoir. On this basis, according to the characteristics of the block, this study subdivides the reservoir unit vertically, implements the development and production in the plane, adjusts the combination mode of the development well pattern, and optimizes the injection and production parameters and the horizontal well deployment parameters. Since the pilot test of stratified development in 2011, 45 new wells have been deployed, of which 29 are straight wells and 16 are horizontal wells. At present, 41 wells have been put into production. The production of the blocks has been increasing year by year, and the development index has been significantly improved. The daily oil production increased by 220 t from 144t before the stratification development, the oil recovery rate increased from 0.85% to 1.15, and the new crude oil production capacity was 8.1 脳 10 4 t. In recent years, the injection-production pattern of vertical wells and the injection-production pattern of horizontal wells have been improved at the same time as productivity construction, and the control reserves of water drive have been increased by 28 脳 10 ~ 4t, and the control degree of water drive reserves has been raised from 50.5% to 80%.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE347

【相似文献】