高储层压力区块生产套管柱优化设计及配套套管的开发与制造

针对克深气田克深13等新勘探开发区块储层埋藏深、地层压力高、关井压力高达110MPa的难点,对塔标Ⅱ号井身的套管柱结构进行了优化设计,并开发了配套的Ф206.38mmx17.25mm BG140V BGT2的非API规格高强度、高韧性、高气密性套管。优化设计后的生产套管柱既能满足高关井压力要求,也可满足钻机大钩悬重要求。评价试验表明,新设计开发的Ф206.38mmx17.25mmBG140VBGT2套管可以满足克深气田新勘探区块的复杂使用工况要求。套管材料的韧脆转变温度低于-74℃,确保了在-38℃极限环境温度下的施工和采气生产安全。

Optimization Design of Casing String for Production in High Reservoir-pressure Blocks and Development and Manufacture of Applicable Casings

Addressing the difficulties associated with the newly-explored/exploited blocks of Keshen Gas Field like Keshen 3, including deep reservoir, high pressure of the stratum, and so high a shut-in pressure as up to 110 MPa, the design for optimization of the casing string structure of the hole geometry of Well Tabiao D is made. Accordingly the Ф206.38 mmx17.25 mm hi-strength, hi-toughness and hi-air tightness non-API BG140V BGT2 casing is developed. The optimized casing string can not only meet the high shut-in pressure requirement, but also satisfy the requirement for hanging load of the drilling rig rotary hook. Relevant evaluation test result shows that the newly designed and developed Ф206.38 mmx 17.25 mm BG140V BGT2 casing is capable of meeting the complicated service conditions of the newly-explored blocks of Keshen Oilfield, and that the FA TT of the casing material is under -74℃,which means that safety for construction and gas production under the limiting ambient temperature of -38℃ shall be ensured.