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大港油田港西明1组油层基本属于未胶结的流砂层,不能用常规的阻挡式防砂办法治理砂害。为此仿效民用水井疏导的办法,采用又阻又疏的综合治理法防砂。此方案由4部分组成:1.选择性地射开部分油层,以减少大部分炮孔被散砂掩埋的严重后果。2.采砂排液。考虑到因油层出砂不至于造成上覆地层的垮塌,一般设计一口井只采砂3～5m~3,转为压裂。3.压裂防砂。4.下筛管砾石充填防砂。1985年10月～1987年9月,用上述方法在5口井上进行了试验,取得施工工艺和有效成功率100%的好效果。
The oil reservoir of Port Xijing Group 1 in Dagang Oilfield basically belongs to the unconsolidated sand layer, which can not be managed by the conventional barrier sand control method. To follow the example of diversion of civilian water wells, the use of resistance and sparse comprehensive management of sand control. The program consists of four parts: 1. Selectively open part of the reservoir to reduce the serious consequences of most of the boreholes burying sand. 2. Sand mining drainage. Taking into account that because of the oil sands will not cause overlying strata collapse, the general design of a well only sand 3 ~ 5m ~ 3, into fracturing. 3. Fracturing sand control. 4 under the gravel packing sand control. From October 1985 to September 1987, five wells were tested by the above method, and the construction technology and the effective success rate of 100% were achieved.