高升油田高北区块储层特征分析及出砂漏失井封堵技术研究
发布时间：2018-10-10 14:11
【摘要】：本文以研究区块的现有地质资料和生产现状为基础,深入分析储层的地层特征、沉积特征、岩性特征、物性特征。该区块储层岩性主要为砂砾岩、含砾砂岩及长石砂砾岩等组成,储层纵向上孔隙类型主要为原生粒间孔,次为溶蚀孔及颗粒裂缝,随着深度增加裂缝发育程度变化不大,裂缝发育受岩性影响明显。通过对该区块的岩性、物性特征发育分析,掌握其地层特征、沉积环境和岩性、孔隙度、敏感性等物性特征,为该区块有针对性的配置冲砂液、堵漏剂和配套施工工艺提供准确的地质资料和数据支持。针对此开展了以暂堵冲砂和封堵配套工艺方面的技术研究工作,以砂体、裂缝等地质特征为依据,通过对暂堵剂成胶粘度、岩芯渗透率恢复实验、耐温性实验等室内研究和冲砂液的理论设计,研究粉体暂堵工艺,在其岩体表面注入一定量粉体暂堵剂,使其表面及内部形成一层较厚的复合层,在完成冲砂作业后,自行溶解,解除堵塞,成功率高,对油层无伤害,解决漏失井建立不起循环、难冲砂、暂堵剂污染油层等作业难题。通过对桥塞剂和配套水泥浆体系的研究,利用改性剂、缓凝剂、膨胀剂、增强剂,进行室内研究优化,使水泥浆性能改善,具有固化时间可调、微膨性、固结强度好和粘度高等特点,配以粉体暂堵成果,整理得出一整套科学有效的出砂漏失井封堵工艺。
[Abstract]:Based on the existing geological data and production status of the studied block, this paper analyzes the stratigraphic, sedimentary, lithologic and physical characteristics of the reservoir. The lithology of reservoir in this block is mainly composed of sandy gravel, gravel sandstone and feldspar sandstones. The main pore types in the reservoir longitudinal are primary intergranular pores, secondary solution pores and granular fractures, and the degree of fracture development changes little with the increase of depth. Fracture development is obviously affected by lithology. By analyzing the development of lithology and physical properties of the block and mastering its stratigraphic characteristics, sedimentary environment, lithology, porosity, sensitivity and so on, the sand flushing fluid is configured for the block. Plugging agent and supporting construction technology provide accurate geological data and data support. In view of this, the technical research work on temporary plugging sand washing and plugging matching technology is carried out. According to the geological characteristics such as sand body and fracture, the experiment of cementing viscosity and core permeability recovery of temporary plugging agent is carried out. Laboratory research and theoretical design of sand washing fluid, research on powder temporary plugging technology, injection of a certain amount of powder temporary plugging agent on the surface of rock mass to form a thicker composite layer on the surface and inside of the rock mass, after finishing the sand washing operation, It can dissolve by itself, remove blockage, have high success rate, have no harm to the reservoir, and solve the problems in operation, such as no circulation, difficult sand washing and temporary plugging agent pollution. Through the study of bridge plug agent and supporting cement slurry system, using modifier, retarder, expander and reinforcer to optimize indoor research, the performance of cement slurry can be improved, the curing time can be adjusted and the property of cement slurry can be improved. With the characteristics of good consolidation strength and high viscosity, a set of scientific and effective plugging technology for sand production leakage wells is obtained by combining with the results of powder temporary plugging.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE358;P618.13
本文编号：2262091
[Abstract]:Based on the existing geological data and production status of the studied block, this paper analyzes the stratigraphic, sedimentary, lithologic and physical characteristics of the reservoir. The lithology of reservoir in this block is mainly composed of sandy gravel, gravel sandstone and feldspar sandstones. The main pore types in the reservoir longitudinal are primary intergranular pores, secondary solution pores and granular fractures, and the degree of fracture development changes little with the increase of depth. Fracture development is obviously affected by lithology. By analyzing the development of lithology and physical properties of the block and mastering its stratigraphic characteristics, sedimentary environment, lithology, porosity, sensitivity and so on, the sand flushing fluid is configured for the block. Plugging agent and supporting construction technology provide accurate geological data and data support. In view of this, the technical research work on temporary plugging sand washing and plugging matching technology is carried out. According to the geological characteristics such as sand body and fracture, the experiment of cementing viscosity and core permeability recovery of temporary plugging agent is carried out. Laboratory research and theoretical design of sand washing fluid, research on powder temporary plugging technology, injection of a certain amount of powder temporary plugging agent on the surface of rock mass to form a thicker composite layer on the surface and inside of the rock mass, after finishing the sand washing operation, It can dissolve by itself, remove blockage, have high success rate, have no harm to the reservoir, and solve the problems in operation, such as no circulation, difficult sand washing and temporary plugging agent pollution. Through the study of bridge plug agent and supporting cement slurry system, using modifier, retarder, expander and reinforcer to optimize indoor research, the performance of cement slurry can be improved, the curing time can be adjusted and the property of cement slurry can be improved. With the characteristics of good consolidation strength and high viscosity, a set of scientific and effective plugging technology for sand production leakage wells is obtained by combining with the results of powder temporary plugging.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE358;P618.13
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