苏丹Muglad盆地福北构造-水动力油藏特征和开发经验

Characteristics and development experiences of Fula N structural-hydrodynamic oil pool in Muglad Basin,Sudan

福拉凹陷位于苏丹共和国Muglad盆地的东北部,福北油藏位于福拉凹陷中部转换带南部,是一个构造-水动力稠油油藏。该油藏具有埋藏较浅、储集层胶结疏松、高孔隙、高渗透以及底水活跃等特点。依据油藏特点应用“排砂冷采”技术进行开发,并采用与之相配套的完井工艺,包括大口径套管、长沉砂口袋完井和射孔时保护厚油层中的泥岩夹层等,使单井日产量平均超过100m3。在出砂严重井采用“有限排砂”开采技术,降低了作业周期和费用,有效地提高了开发效益。

Located in the south of central transitional zone of the Fula sub-basin, northeastern Muglad Basin, Sudan, the Fula N is a structural-hydrodynamic heavy oil pool with shallow burial depth, loosely cemented reservoir, high porosity and permeability, and active bottom water. These features make the CHOPS （cold heavy oil production with sand） a suitable technology for the development of the pool. Matching technologies, such as completion with bigger size casing and long sand pocket and protection of interbedded shale in thick oil layer during perforation, are adopted, achieving an average daily production of more than 100 m^3 from single well. In wells with severe sand problem, the production technology known as ＂limited sand control＂ is used to reduce the operation cycle and cost, and enhance the economic returns.