四川盆地威远地区龙马溪组页岩气产能建设目标优选

发布时间：2018-08-11 10:11

【摘要】：威远页岩气产业化示范区内页岩气勘探开发获得战略性突破,但页岩地层非均质性较强,井间产量差异性大,分析产能影响因素,优选示范区内的页岩气产能建设核心区是当前的重要任务。通过岩心观察与描述、老井复查、分析测试等手段分析了页岩地层、储层特征,根据海相页岩气储层分级评价标准对威远地区龙马溪组页岩进行储层综合评价；采用基于网格积分的容积法计算了威远地区页岩气资源量；从地形、水系、管网、城市规划区、风景区五方面分析了威远地区地面条件。结果表明：由于受到剥蚀的影响,龙马溪组地层厚度远离剥蚀区有增厚的趋势；威远地区页岩气储层质量好,优质页岩气储层厚为20.14m～46.45m；威远地区页岩气总资源量为4.8×1012m3,平均资源丰度为5.27×108m3/km2,资源丰度远离剥蚀区向南东方向有增大的趋势；威远地区丘陵范围大,地形条件好,水系发育,水源条件好,扣除城市规划区、矿权面积,地面可工作面积较大,为4311.65km2,输气主干线主要为南北向,集气干线主要为东西向,区域内管网发达。通过对比分析国内外选区研究现状,选择了埋深、厚度、资源丰度、压力系数、地应力、地面条件六个参数作为页岩气建产核心区评价参数,建立了中国海相页岩气建产核心区优选标准,运用综合信息叠合法,对威远地区龙马溪组页岩气建产核心区进行优选。威远地区优选出1个建产核心区,即W2-W4井区,可建产面积为1108.88km2。从优选出的核心区内钻井油气显示、试油、生产情况来看,钻探效果好,验证了选区的合理性,有效地指导了页岩气产能建设。
[Abstract]:The exploration and development of shale gas in Weiyuan shale gas industrialization demonstration area has made a strategic breakthrough, but the shale formation heterogeneity is strong, the cross-well production is different, and the factors affecting productivity are analyzed. The core area of shale gas productivity construction is an important task at present. The shale formation and reservoir characteristics are analyzed by core observation and description, old well review, analysis and test, and comprehensive reservoir evaluation of Longmaxi formation shale in Weiyuan area is carried out according to marine shale gas reservoir classification evaluation standard. The volume method based on grid integral is used to calculate the shale gas resources in Weiyuan area, and the ground conditions in Weiyuan area are analyzed from five aspects: topography, water system, pipe network, urban planning area and scenic spot. The results show that the formation thickness of Longmaxi formation has a tendency of thickening away from the denudation area due to the influence of denudation, the quality of shale gas reservoir in Weiyuan area is good, the thickness of high quality shale gas reservoir is 20.14 m ~ 46.45 m, and the thickness of high quality shale gas reservoir is 20.14 m ~ 46.45 m. The total amount of shale gas resources in Weiyuan area is 4.8 脳 1012m3, the average resource abundance is 5.27 脳 108m3 / km2, and the resource abundance increases from the denudation area to the south and east. The area of mine right is larger, the working area of ground is 4311.65km2, the main trunk of gas transmission is mainly from south to north, the main trunk of gas gathering is mainly from east to west, and the pipe network in the region is developed. Based on the comparative analysis of the present situation of the selection research at home and abroad, six parameters, such as buried depth, thickness, resource abundance, pressure coefficient, ground stress and ground condition, are selected as the evaluation parameters of shale gas production core area. The criteria for optimal selection of marine shale gas production core area in China were established and the core area of shale gas production of Longmaxi formation in Weiyuan area was selected by comprehensive information stack method. In Weiyuan area, one core area was selected, that is, W2-W4 well area, with an area of 1108.88km2. The oil and gas drilling in the selected core area shows that the drilling effect is good in oil testing and production, which verifies the rationality of the selection area and effectively guides the production capacity construction of shale gas.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE328;P618.13

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