Research On Horizontal Well Pattern Optimization For The Chang6Reservoir,Upper Triassic Of Dan110Wellblock In Ansai Oilfield, Ordos Basin

In view of the Ansai oil field high quality reserves insufficient resources, in recent years, gradually increasing the superficial layer of class II and class III reservoir development efforts, Ansai since1993, with the development and perfection of technology, horizontal well technology has been popularized and applied. The horizontal well has been developed mainly present well pattern is unreasonable, resulting in horizontal well to see water, decreasing and other issues, so in110wells Dan Chang6reservoir horizontal well network optimization research.Based on the phase in the reservoir and deposition, both at home and abroad experience analogy reservoir horizontal well development, applied geology, reservoir physics, fluid mechanics and production engineering, design, adjustment, evaluation of Dan110well area horizontal well network, according to the actual production dynamic correction, the Dan110well the reasonable well pattern, reservoir parameters, injection timing and injection production parameters.Table110well developed Mingdan Chang6reservoir horizontal well, should take the five spot well network, suggested a direct injection well, horizontal well, well spacing is120m, the row spacing is240m, horizontal section400meters, fracture penetration ratio5,0.2-0.4; well pattern and row direction of the main crack is parallel to the direction of the development effect is good; the reasonable injection parameters and the injection timing, suggests to adopt advanced water injection, water injection time was3months, injection volume was llt/d; injection production pressure parameters of system, the maximum injection pressure is15MPa, the minimum flow pressure3.3MPa.