调整水平井固井工艺技术

Optimization of the Horizontal Well Cementing Technology

实践证明水平井不仅可以成功地用于开采低渗透油藏、地层不整合油藏、裂缝性油藏及超薄油层,使油气产量大幅增加;而且能有效对老油气田再次进行勘探和开发,最大限度地把残余存油开采出来。A油田地质构造较为复杂,断层多,地层倾角大,地层压力层系错杂,低渗、多裂缝、薄油层油藏较多,地层富含盐膏层,漏失量大,固井难点多,固井效果难以提升。针对A油田特定区块较为复杂的地质构造,从固井工艺和完善水泥浆性能两方面进行了完善,旨在改善并提高A油区的固井质量。

The practice proves that the horizontal well not only can be successfully used in low permeability reservoirs, stratigraphic unconformity reservoirs, fractured reservoirs and thin oil reservoirs to greatly increase oil and gas production, but also can be efficiently used in exploration and development of old gas fields. A oilfield geological structure is relatively complex, the dip angle is large, the formation pressure layer system is heterogeneous; low permeability thin oil reservoirs are rich, there are rich salt paste layers in the formation, the loss is big, the cementing is difficult, it is difficult to improve cementing effect. According to specific block complex geological structure in A oilfield, the cementing technology and cement properties have been improved to increase the quality of cementing.