Well Boshenxie 10 is a key risk exploration well of Sinopec, which is deployed by the oil and gas exploration center in Block Boshenxie 10 in the north of Bonan Depression in Zhanhua Depression, Jiyang Depression. The...Well Boshenxie 10 is a key risk exploration well of Sinopec, which is deployed by the oil and gas exploration center in Block Boshenxie 10 in the north of Bonan Depression in Zhanhua Depression, Jiyang Depression. The third and fourth spudding sections of this well are dominated by mudstone, sandstone and mudstone interbedding, and the third spudding section has high-pressure layers containing hydrogen sulfide, especially the lower Shahejie Formation, Kong1 Formation and Kong2 Formation in the fourth spudding section have low exploration degree, and the pressure coefficient is mainly speculative data, and the temperature of Kong2 Formation can reach 200. The drilling fluid system for the third and fourth spudding mainly adopts high-temperature resistant composite salt lubrication sealing and anti-sloughing. This system has the advantages of strong anti-pollution ability and stable borehole wall. There is no complicated situation in the whole third and fourth spudding sections, and there is no blockage or sticking during tripping, and there is no falling back. The electrical logging diameter expansion rate is about 3%, so the construction is smooth.展开更多
文摘Well Boshenxie 10 is a key risk exploration well of Sinopec, which is deployed by the oil and gas exploration center in Block Boshenxie 10 in the north of Bonan Depression in Zhanhua Depression, Jiyang Depression. The third and fourth spudding sections of this well are dominated by mudstone, sandstone and mudstone interbedding, and the third spudding section has high-pressure layers containing hydrogen sulfide, especially the lower Shahejie Formation, Kong1 Formation and Kong2 Formation in the fourth spudding section have low exploration degree, and the pressure coefficient is mainly speculative data, and the temperature of Kong2 Formation can reach 200. The drilling fluid system for the third and fourth spudding mainly adopts high-temperature resistant composite salt lubrication sealing and anti-sloughing. This system has the advantages of strong anti-pollution ability and stable borehole wall. There is no complicated situation in the whole third and fourth spudding sections, and there is no blockage or sticking during tripping, and there is no falling back. The electrical logging diameter expansion rate is about 3%, so the construction is smooth.
