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绥中 36— 1油田属于低压稠油油田 ,目的层位为东营组下段 ,储层岩石胶结疏松 ,孔渗性极大。根据现场观察法、经验法及力学计算法等防砂判据综合判断 ,油井出砂将成为贯穿开发生产过程的主要问题 ,防砂则为开发生产及油层保护的重点和核心。由于绥中 36— 1油田地层纵向上层系多、含夹层 (泥岩夹层、含水夹层 )等特殊情况 ,经研究后决定采用下套管注水泥固井并在射孔套管内进行井下砾石充填完井。结合国内外的经验和我们的理论研究 ,表明压裂充填不仅能消除射孔压实表皮系数 ,而且能消除全部或大部分的钻井损害 ,同时还具有增产作用 ,使得压裂充填完井产能基本上能恢复到天然产能 ,效果非常明显。由此可见 ,压裂充填完井是低压稠油出砂油田较好的防砂完井方式
Suizhong 36-1 Oilfield belongs to the low-pressure heavy oilfield, the purpose of the reservoir is the lower part of Dongying Formation, and the rock of the reservoir is loosely cemented with great porosity and permeability. According to the comprehensive judgment of the sand control criteria such as on-site observation method, experience method and mechanics calculation method, oil well sanding will become the main problem throughout the development and production process. Sand control is the key and core of development and production and reservoir protection. Because Suizhong 36-1 Oilfield has many strata in the upper strata, including intercalation (mudstone intercalation and water-bearing intercalation), it is decided that cementing should be carried out with casing under casing and underground gravel filling and completion in perforating casing . Combining domestic and foreign experience and our theoretical research, it shows that fracturing filling not only can eliminate perforation compaction skin factor, but also can eliminate all or most of the drilling damage, but also has the stimulation effect, making fracturing filling completion productivity basic Can be restored to natural productivity, the effect is very obvious. It can be seen that fracturing filling and completion well is a good sand control and completion method for low pressure heavy oil sand production field