论文部分内容阅读
杏南开发区储层包括含钙特低渗透储层、表外储层和表内储层。其沉积环境复杂,油层之间的岩石物性相差较大,开发后动用状况复杂,剩余油分布高度零散,调整挖潜难度大。依据杏南开发区含钙特低渗透储层发育特征和注水开发动态特点,结合目前区块剩余油分布,研究层系组合和加密调整对开发效果的影响,为进行注采系统调整提供依据。针对杏南开发区的特点,首先设计了层系与井网井距相结合的部署方案,层系设计包括:射开含钙特低渗透储层和表外储层;射开含钙特低渗透储层、表外储层和有效厚度小于0.5m的表内层;射开含钙特低渗透储层和所有油层。将3套层系与4种井网、井距情况相结合,组合为12套方案,进行开发指标预测方案优选。结合经济评价认为,方案3为最优方案,即在原井网排间分流线位置布采油井,原井网采油井全部转注,新老井共同组成注采井距150m线状注水井网,射开含钙特低渗透储层和所有油层。
Xingnan Development Zone, including ultra-low permeability of calcium reservoirs, off-balance sheet and surface reservoirs. The sedimentary environment is complex and the petrophysical properties vary greatly between oil layers. After the development, it is complicated to use and the remaining oil is highly scattered and difficult to adjust and tap. According to the development characteristics of the ultra-low permeability ultra-low permeability reservoirs in Xingnan Development Zone and the dynamic characteristics of waterflooding development, the influence of the combination of layer system and encryption adjustment on the development effect is analyzed based on the remaining oil distribution in the block so as to provide the basis for the adjustment of injection-production system. According to the characteristics of Xingnan Development Zone, the dissertation first designs the deployment scheme of the combination of strata and well spacing. The stratum design includes: shooting ultra-low permeability ultra-low permeability reservoirs and off-surface reservoirs; Permeable reservoirs, off-surface reservoirs and surface layers with an effective thickness of less than 0.5 m; shotcrete ultra-low permeability reservoirs and all reservoirs. Combining 3 sets of strata with 4 types of well patterns and well spacing, 12 sets of schemes are combined to optimize the development index forecasting scheme. According to the economic evaluation, Option 3 is the optimal solution, that is, oil distribution wells are laid at the shunt lines of the original well grids and the wells of the original well are all transferred. The new and old wells together form a 150m linear well injection well pattern. Open ultra-low permeability reservoirs and all reservoirs.