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为了解决吐哈油田深井钻井遇到的大段泥页岩和煤系地层井眼失稳、大尺寸井眼钻井速度慢、多套储层的系统保护及长封固段非标准间隙的固井质量四大技术难题,进行了吐哈油田深井钻井配套技术的研究。从加深四项基础研究入手,建立了“地层造斜特性、钻井岩石力学特性、‘三压力’、泥页岩矿物组份和理化性能”四个基础剖面;在此基础上进行了“井眼力学稳定性评估技术、钻井岩石力学特性预测与钻头选型技术、‘三压力’剖面优化井身结构技术、深井聚合物钻井液技术、大段泥页岩和煤系地层安全钻井技术、311大尺寸井眼快速钻井技术、多套储层系统保护技术、低压易漏及长封固段非标准间隙固井技术、深井事故预防和处理技术、深井钻井装备的完善配套技术”的应用研究。初步形成了一套具有吐哈特色的深井钻井配套技术,极大地促进了油田钻井整体水平的提高。
In order to solve the wellbore instability of large shale and coal series strata encountered in deep well drilling in Tuha Oilfield, the drilling speed of large-scale wellbore is slow, the system protection of multiple sets of reservoirs and the cementing of non-standard interval of long seal interval Quality of the four major technical problems, carried out Tuha Oilfield deep well drilling technology research. Starting with the deepening of four basic studies, four basic sections of “Stratigraphic Correction Behavior, Drilling Rock Mechanical Characteristics, ’Three Pressure’, Shale Mineral Composition and Physical and Chemical Properties” were established. On this basis, “Wellbore Mechanical stability assessment, prediction of drilling rock mechanics properties and bit selection, optimization of wellbore structure with ’three pressure’ profile, deep well polymer drilling fluid technology, large section shale and coal formation safety drilling technology, 311 large Dimensional wellbore rapid drilling technology, multiple sets of reservoir system protection technology, low pressure leakage and long seal section of non-standard gap cementing technology, deep well accident prevention and treatment technology, deep well drilling equipment and improve the supporting technology ”application research. A set of deep well drilling supporting technology with Tuha characteristics has been initially formed, which has greatly promoted the overall improvement of oilfield drilling.