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墨西哥南部地区面临的挑战之一是水管理。油流中的水增加了其处理费用,导致结垢,降低了采油量,最终关井(与修井费用有关)。甚至当产层中仍然含有大量可采油气时,也常常将这些层废弃以避免产水。虽然天然裂缝对油流有积极的作用,但它们也促进了由锥进效应或油气产层和其上或下层段之间的高渗透薄夹层引起的水或气的流动。如果这些油层产水,就会很快影响其生产能力。另一个必须解决的问题是:边水通过断层、天然裂缝等流动引起的早期水突破。本文将讨论墨西哥南部使用经有机交联剂活化的低相对分子质量聚合物的实例,介绍候选对象的选择过程、总体作业设计、实验室试验结果等,以及在这一地区进行的降低产水量处理。实例中包括衰竭、高度裂缝性油藏。
One of the challenges facing southern Mexico is water management. Water in the oil stream increases its disposal costs, leads to fouling, reduces oil production, and eventually closes the well (related to workover costs). Even when there is still a significant amount of recoverable gas in the pay zone, it is often discarded to avoid water production. Although natural fractures have a positive effect on oil flow, they also promote the flow of water or gas caused by the cone effect or the high permeability thin interbed between the hydrocarbon pay zone and its upper or lower interval. If these reservoirs produce water, they quickly affect their capacity. Another problem that must be solved is the early breakthrough of water caused by the flow of edge water through faults and natural fractures. This article will discuss examples of the use of low molecular weight polymers activated by organic crosslinkers in southern Mexico to introduce candidate selection processes, overall job design, laboratory test results, etc., as well as water reductions in the region . Examples include depleted, highly fractured reservoirs.