论文部分内容阅读
本文阐述了大庆多油层砂岩油田的一个试验区的注水开发方法。 试验表明,各油层以及单一油层各采油井之间的不均衡开采是多油层砂岩油田注水开发的基本特点。依据这一特点,试验区在高产稳产期划分为三个阶段:高渗透率油层为主要开采对象的阶段;分层挖潜中渗透率油层接替阶段;加密井网低渗透率油层接替阶段。由于相应采取了合适的分层开采工艺和调整措施,减缓层间干扰,使各类油层储量逐步地充分发挥作用,产量互相接替,使试验区最近十年来采油速度一直保持2％,单井产量稳定,含水上升率低于2％,取得了较好的开发效果。通过实践和理论研究形成了一套“早期分层注水,保持压力采油,实行接替稳产”的分层开采的开发原则和方法,对大庆油田的开发起到了重要的指导作用。
This article describes the waterflood development method in a pilot area of Daqing multi-reservoir sandstone oilfield. Experiments show that the unbalanced exploitation between oil reservoirs and oil wells in a single reservoir is the basic characteristic of waterflood development in multi-reservoir sandstone oilfields. According to this feature, the test area is divided into three stages in the period of high and stable yield: high-permeability reservoir is the main mining object phase; sub-potential to tap the medium-permeability reservoir succession; Due to the corresponding stratified mining technology and adjustment measures taken to reduce inter-layer interference, all types of oil and gas reservoirs are fully utilized step by step and the outputs are mutually replaced so that the oil recovery rate in the pilot area has been maintained at 2% for the last 10 years. Single well production Stable, water-cut rate of less than 2%, and achieved good development results. Through the practice and theoretical research, a set of principles and methods for the development of stratified mining with “early stratified water flooding, pressure oil recovery, and steady succession” were adopted, which played an important guiding role in the development of Daqing Oilfield.