马56块致密油油藏井网整体压裂研究

发布时间：2018-11-27 07:16

【摘要】：致密油储层具有岩性致密、特低渗、自然产能低、裂缝发育等典型特征,利用常规改造形成单一裂缝很难获得好的增产效果,开发难度极大。对致密油油藏实施水平井井网整体压裂改造,从根本上改变流体渗流模式,是一项开发致密油油藏卓有成效的技术。目前水平井井网整体压裂技术已经是致密油油藏开发所必须采用的基本技术思路。本文分析和研究了马56块凝灰岩致密油油藏地质特点,油层分布稳定,具有中高孔、特低渗、高含油饱和度、高脆性指数的特征,适宜于水平井井网整体压裂技术开发。马56块主体开发技术政策借鉴国内外相似油藏开发经验,马56块采用一套开发层系衰竭式开发,应用油藏工程方法论证了油藏衰竭式开发采收率以及合理单井产能。按照“整体体积改造”理念,应用区域应力分析、裂缝监测资料,开展油藏数模并结合实际压裂效果分析,确定了水平井排距、方位、水平段长等主要布井参数,实现“油藏压裂全破碎且不压窜”的整体体积改造要求。应用数值模拟技术对水平井合理工作制度和稳产能力进行了分析研究,确认了生产采用“控压排采”技术,防止压敏效应,延长自喷期确保压后效果。最后对实施效果进行了阶段分析,重点对产能影响因素、递减规律、采收率等几个最能反映其开发特点的关键指标进行了效果评价。
[Abstract]:The tight oil reservoir has the typical characteristics of tight lithology, low permeability, low natural productivity and fracture development. It is difficult to obtain a good effect of increasing production by conventional transformation to form a single fracture, and it is very difficult to develop. It is an effective technique to develop tight oil reservoir by implementing the integral fracturing reconstruction of horizontal well pattern to change the fluid percolation mode fundamentally. At present, the integral fracturing technology of horizontal well pattern has been the basic technical thinking that must be adopted in the development of tight oil reservoir. In this paper, the geological characteristics of dense oil reservoir of tuff in block Ma 56 are analyzed and studied. The reservoir distribution is stable, and it has the characteristics of medium and high porosity, ultra-low permeability, high oil saturation and high brittleness index, which is suitable for the development of integral fracturing technology in horizontal well pattern. The main development technology policy of Ma 56 block draws lessons from similar reservoir development experience at home and abroad. Ma 56 block adopts a set of development layer failure development. Reservoir engineering method is used to demonstrate reservoir failure development recovery and reasonable single well productivity. According to the concept of "integral volume transformation", using regional stress analysis, fracture monitoring data, reservoir mathematical model and actual fracturing effect analysis, the main well layout parameters, such as horizontal well spacing, azimuth and horizontal section length, are determined. The whole volume reformation requirement of "reservoir fracturing is completely broken and no pressure channeling" is realized. The reasonable working system and stable production capacity of horizontal wells are analyzed and studied by using numerical simulation technology. It is confirmed that "controlled pressure production" technology is adopted in production to prevent pressure-sensitive effect and to prolong the self-blowout period to ensure the post-pressure-pressure effect. Finally, the stage analysis of the implementation effect is carried out, with emphasis on the effect evaluation of several key indexes, such as productivity influencing factors, decreasing law, oil recovery and so on, which can best reflect the characteristics of its development.
【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】：TE357

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