论文部分内容阅读
针对制约束鹿凹陷致密油储层改造瓶颈问题,以储层改造为核心,逆向设计,利用物模与数模方法论证体积压裂可行性,优选针对性压裂液体系,形成了提高砾岩-泥灰岩裂缝复杂化程度的清洁酸压与加砂压裂结合的特色体积改造压裂技术:1开展储层脆性、裂缝弱面、两向应力差等体积改造地质条件分析,结合数模结果得出体积压裂的可行性;2开展3种完井方式与5种改造工具的配套优选,形成利于提高排量促进复杂缝网形成的“筛套结合”完井方式;3针对储层超低渗易伤害的特点,进行低伤害酸液和新型液体评价实验,形成与储层配伍和低伤害特点的清洁酸与新型压裂液体系;4针对砾岩、泥灰岩不同岩性,开展清洁转向酸裂缝刻蚀实验,利用岩板进行酸与支撑剂的裂缝导流能力优化,提出砾岩、泥灰岩酸压与加砂压裂相结合的复合改造新工艺;5形成束鹿凹陷致密油改造现场高效施工及压后分层求产的配套技术。通过该种技术在束探1H等3口井15段改造中的综合应用,稳定日产油量由以往的1.2t/d提高到11.3t/d。
In view of the bottleneck that restricts the transformation of tight oil reservoirs in Shulu Sag, taking the reservoir reformation as the core and reverse design, the feasibility of volumetric fracturing is demonstrated by using the model and numerical simulation methods. The targeted fracturing fluid system is optimized, - Characteristics of marlite fractures combined with clean acid fracturing and sand fracturing with special volume modification Fracturing techniques: 1 To carry out analysis of geological conditions such as volumetric alteration of reservoir brittleness, weak fractures and two-way stress difference, combined with numerical simulation The results obtained the feasibility of volumetric fracturing; 2 to carry out three kinds of completion methods and five kinds of transformation tools supporting the preferred form to help improve the displacement to promote the formation of complex seam network The reservoir is characterized by ultra-low permeability and easy to damage, the low acid and new liquid evaluation experiment is carried out, and the clean acid and new fracturing fluid system are formed with the characteristics of reservoir compatibility and low damage. 4 For different rocks of conglomerate and marl , Carry out the experiment of cleaning and diverting acid fractures, optimize the fracture conductivity of acid and proppants by using rock slabs, and propose a new combined reforming process combining the acid fracturing of conglomerate and marl with sand fracturing; 5 The deformation of tight oil in Shulu Sag Efficient construction and post-press technology and supporting stratified production. Through the comprehensive application of this kind of technology in the transformation of 15 sections of beam penetration 1H and other 3 wells, the steady daily oil production increased from 1.2t / d to 11.3t / d in the past.