论文部分内容阅读
根据尕斯N1-N12油藏的出砂情况,提出了堵水固砂一体化技术。介绍了堵水固砂一体化技术原理,给出了堵水固砂剂的配方及技术指标。该技术具有如下特点:①适应温度范围40～90℃;②能显著降低水在二氧化硅表面的接触角,增强表面水湿性;③对岩石表面具有强亲水性,可起到堵水增油的作用。④封堵强度高,耐温及抗盐性能好,对地层骨架砂及非地层骨架砂都具有良好的固砂效果;⑤对油层损害小,岩心渗透率伤害率≤20%;⑥对岩心(水相)有很好的封堵能力,封堵率大于95%,突破压力梯度大于10MPa/m;⑦在油相中的堵塞率大大低于水相中的堵塞率,油相中的突破压力小于水相中的突破压力,有利于堵住出水孔道;⑧施工工艺简单,使用安全。现场试验5口井,工艺成功率和固砂见效率100%,堵水见效率75%,试验井增油3669t。
According to the sands in Gas N1-N12 reservoir, an integrated technology of water and sand fixation was proposed. The principle of water blocking and solidifying sand integration was introduced, and the formulas and technical indexes of water blocking and solidifying agent were given. The technology has the following characteristics: ① to adapt to the temperature range of 40 ~ 90 ℃; ② can significantly reduce the contact angle of water in the silica surface to enhance the surface water wet; ③ on the rock surface has a strong hydrophilic, can play a plug water The role of oil. ④ good sealing strength, good temperature resistance and salt resistance, good sand fixation effect for both stratigraphic and non-stratigraphic sands; ⑤ little damage to the reservoir, core permeability damage rate ≤20%; Water phase) has a good plugging capacity, plugging rate greater than 95%, breakthrough pressure gradient greater than 10MPa / m; ⑦ in the oil phase in the blocking rate was significantly lower than in the water phase of the plugging rate, oil breakthrough pressure Less than the breakthrough pressure in the water phase, is conducive to blocking the water hole; ⑧ construction process is simple, safe to use. Field test 5 wells, process success rate and see the efficiency of 100% solid sand, blocking water, see the efficiency of 75%, test well oil 3669t.