苏丹P油田出砂规律与防砂时机

苏丹P油田的Y-S组是该油田的主力含油层组,埋深1300 m左右,储层胶结疏松,成岩性差,属于高孔、高渗储层,生产过程中易于出砂,对油井正常生产造成负面影响,降低海外油田开发的经济效益。为了解决油井高产与出砂的矛盾,应用声波时差法、孔隙度法、组合模量法、斯伦贝谢比法、出砂指数法、储层岩石坚固程度与力学稳定性分析等出砂预测方法对油田的主力产层进行了出砂预测,建立适用的出砂判识模式,指出油田出砂敏感区域并总结出砂规律,凡处于断层(尤其是大断层)附近和构造顶部的井,都应引起重点关注。同时利用油田含水、生产压差及地层压力变化等生产动态参数预测油井的防砂时机,对现场生产具有预报和指导作用。

Sanding rules and proper sanding control time of Sudan P Oilfield

Formation Y-S is the major oil-bearing formation of Sudan P oilfield, with its buried depth being1300 meters. The formation features in poor consolidation, bad diagenesis, high porosity and permeability. The sanding-prone problem of the formation has negative impact on the proper production of oil wells and lowers the economic results in developing overseas oilfields. To solve the conflict between high single-well production and sanding problem, the author employs multiple sanding prediction methods to predict the major pay zones of the oilfield, such as interval transit time method, porosity method, assembling die mensuration, Schlumberger method, sand production coefficient method, wellbore solidity method, and mechanics stability method, establishes a proper sanding identification model, points out the sensitive sanding areas, and summarizes sanding rules. The author also mentions that the wells near faults (especially major faults) and on the top of structures should be paid more attention. What's more, dynamic production parameters such as changes in watercut, production pressure difference, and formation pressure are used to predict proper sand control time, which helps predict and guide actual production.