关键词:  深层页岩气, 控近扩远, 连续加砂, 体积压裂

Abstract:  Weirong shale gas reservoir of Sinopec is buried 3600 - 3900m deep, the thickness of optimum reservoir is 35. 5~ 46. 6m, the porosity 4% - 6. 6% , TOC 2. 2 ~ 4. 0% , Ro2. 0 ~ 2. 6% , gas content 2. 56 ~ 4. 88t /m³ , ground pressure coefficient about 1 . 9MPa /100m. Laboratory experiments and core analysis show that Weirong deep shale is brittle minerals and mechanical brittleness index is high, but the biaxial stress difference is between 6 ~ 16 MPa, which makes it more difficult to get the complex cracks. According to the difficulties in fracturing transformation, the “ variable displacement + dense slug + continuous sand addition” was successfully developed and applied successfully in Wells WY23-HF and WY29-1 HF, with the post-fracturing production tested at 26. 01 × 104m3 /d ( 35. 4MPa) and 23. 80 × 10⁴m³ /d( 22. 2 MPa) respectively, a breakthrough in commercial development of Weirong deep shale gas.

Key words:  , deep shale gas, near control distant expansion, continuous sand mixing, volumetric fracturing