论文部分内容阅读
W5、W8普通稠油油藏具有埋藏深度浅、多层状砂泥薄互层、中孔、中低渗型储层且隔夹层薄的地质特点 ,地层原油流度低 ,未经过储层改造的单井自然产量低。针对这种情况 ,近几年来 ,通过在储层物性、含油性及井筒技术状况等方面进行压裂选进条件的优化 ,开展了注水稠油油藏的水力压裂引效探索性试验 ,应用高砂比的高导流能力短缝技术、小排量小规模控制缝高技术、防止水基压裂液与稠油乳化措施及防止压裂后目的层底部地层水上窜技术等配套水力压裂工艺 ,增产效果较为明显 ,油田开发效果得到改善。通过该稠油油藏水力压裂的实践认为 ,压裂选井的有利方向主要位于储层物性及含油性较好的构造高部位 ,压裂工艺的关键是合理控制压裂规模
W5 and W8 common heavy oil reservoirs have the geological characteristics of shallow and multi-layered sand-mud thin interbedded, medium-porosity and medium-low permeability reservoirs with thin interbedded layers. The crude oil flow in the strata is low and has not been altered by the reservoir The single well natural yield is low. In response to this situation, in recent years, exploratory hydraulic fracturing exploratory test of heavy oil-flooded reservoirs has been carried out by optimizing fracturing conditions in terms of physical properties, oil-bearing properties and wellbore technical conditions. Applications High-sand ratio of high flow capacity of the short seam technology, small-displacement control of small-scale high-tech, to prevent water-based fracturing fluid and heavy oil emulsification measures to prevent the bottom of the target layer after fracturing water channeling technology and other supporting hydraulic fracturing process , The effect of increasing production is obvious, and the effect of oilfield development is improved. Through the practice of hydraulic fracturing in this heavy oil reservoir, it is considered that the favorable direction of fracturing well selection is mainly located in the high structural part with good reservoir physical properties and oiliness. The key of fracturing technology is to control fracturing scale rationally