CAJ | 학술논문

四川金秋区块深盆气资源丰富,但存在地层压力系数较高、气层活跃、CO2气侵严重、上部存在较厚的紫红色泥岩层极易造浆等难题,且甲方要求不能影响测井,这些均对钻井液提出了较高要求.针对以上问题,结合该地区特点,优选出复合钾盐抑制剂、降滤失剂等处理剂,研发出复合钾盐聚合物钻井液.该体系对泥岩岩屑一次回收率93%、抗 CO2、钙镁离子污染能力强,密度最高可达2.20~2.30 g/cm3.现场应用结果表明,该体系能够满足四川金秋区块的钻井需要.
사천금추구괴심분기자원봉부,단존재지층압력계수교고、기층활약、CO2기침엄중、상부존재교후적자홍색니암층겁역조장등난제,차갑방요구불능영향측정,저사균대찬정액제출료교고요구.침대이상문제,결합해지구특점,우선출복합갑염억제제、강려실제등처리제,연발출복합갑염취합물찬정액.해체계대니암암설일차회수솔93%、항 CO2、개미리자오염능력강,밀도최고가체2.20~2.30 g/cm3.현장응용결과표명,해체계능구만족사천금추구괴적찬정수요.
Jinqiu block in Sichuan is rich in deep-basin gas, but has high pressure coefficient, active gas layer, and serious CO2 inva-sion. The upper thick purple shale was easy to hydrate mud-making formation and the logging was required to be not affected by slurry. These are high requirements for drilling fluid. Based on the existing technical difficulties of drilling fluid, the strong inhibition of potas-sium salt polymer drilling fluid system was optimized. This system uses the preferred compound potassium salt as main inhibitors. The advantages of this system are strong inhibition, good temperature resistance ability, anti-pollution ability, and high density of 2.20 -2.30 g/cm3, which can meet the drilling requirements in the region.