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METHOD OF CONSTRUCTION OF WELLS FOR PROSPECTING AND EXTRACTION OF FLUIDS ACCUMULATED IN FRACTURING RESERVOIRS

机译:裂缝性储层中积聚流体的勘探与开采井的建造方法

摘要

FIELD: construction; mining.;SUBSTANCE: invention relates to the field of well construction, and in particular to the construction of the well associated with the natural fracture type reservoirs. Method involves primary opening of the reservoir with a well using a composite drill string. Well is drilled from the drilled cuttings by the ascending flow of drilling fluid. Production string is lowered and seams are separated in its annulus space and inflow of formation fluid is stimulated. At that, primary opening of the reservoir is performed with cleaning of the well from drilled rock - sludge with drilling fluid at reverse continuous flushing. Slime samples are taken to detect characteristic minerals for filling natural cracks and to determine intervals of natural fracture clusters from these data. Data on absorption of drilling fluid or inflow of formation fluids are used to cross clusters of natural cracks with open and closed mineralized fractures. Among clusters with open cracks data on intensity of absorption of drilling fluid or inflow of reservoir fluids during drilling are allocated clusters of cracks with industrial potential, which do not need stimulation at completion of well. Clusters with low potential are identified, which need stimulation of influx at well completion. Production string is equipped with devices separating clusters of natural cracks in aforesaid column space. Influx is stimulated in intervals of clusters of mineralized cracks and clusters of open cracks with low industrial potential. Performing perforation of production string in intervals of clusters of cracks, not requiring stimulation. Then the well is developed.;EFFECT: technical result is higher efficiency of construction due to prevention of colmatation of natural cracks and targeted stimulation.;1 cl, 3 dwg
机译:领域:建筑;物质:本发明涉及井的建造领域,尤其涉及与天然裂缝型油藏相关的井的建造。该方法涉及使用复合钻柱用井对储层进行初次打开。钻井液的上升流是从钻屑中钻出的。降低生产管柱,并在其环空空间中分离接缝,并刺激地层流体的流入。那时,在反向连续冲洗时,用钻井液从钻井的岩石污泥中清除井,从而进行储层的初次打开。采集煤泥样品以检测用于填充天然裂缝的特征矿物,并根据这些数据确定天然裂缝簇的间隔。有关钻井液吸收或地层流体流入的数据用于使天然裂缝簇与开裂和闭合矿化裂缝交叉。在具有开裂裂缝的集群中,有关钻井液吸收强度或钻井过程中储层流体流入的数据分配了具有工业潜力的裂缝集群,这些裂缝在完井时无需增产。识别出低潜能的团簇,需要在完井时刺激涌入。生产管柱配备有在上述柱空间中分离自然裂缝簇的装置。涌入的矿化裂缝簇和开放裂缝簇之间的间隔时间短,工业潜力低。按裂缝簇的间隔执行生产管柱的穿孔,不需要刺激。效果:技术结果是由于防止了自然裂缝的形成和有针对性的增产而提高了施工效率; 1 cl,3 dwg

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