复合堵水防砂一体化技术在垦东12区块的应用及效果评价

The Application and Effect Asses of Water Plugging and Sand Control Integration Technology at Kendong Block 12 of Shengli Xintan Oilfield

垦东12区块属于典型的河流相油藏,非均质性严重,边底水普遍发育,油层厚度较薄,并且该区块为稠油油藏,油水粘度比大,边底水容易沿着高渗透相带侵入油层,在油层实际动用程度较低的情况下造成油井高含水。在分析垦东12区块出水机理的基础上,优选了化学堵剂和注入段塞,实现了远调近堵堵水防砂一体化效果。通过实施该工艺,油井综合含水由堵前93.2%下降到70.6%,下降了22.6%,日增油24.2t,其中两口井有效期分别达到50、75天;同时分析了储层物性、流体特性以及施工工艺对该区块复合堵水防砂效果的影响,为该区块开展下一步堵水措施提供了依据。

Kendong Block 12 of Shengli Xintan Oilfield belongs to typical fluvial facies heavy oil reservoir.The heterogeneity of the block is serious,the edge-bottom water is widely developed,oil/water viscosity ratio is big,which caused edge-bottom water invasion along high permeability belt in the reservoir,and high water cut under the condition of lower producing degree of the reservoir.On the basis of analyzing the water breakthrough mechanism of block 12,the chemical plugging agent and injected slug were optimized,and the remote adjustment nearly plugging water plugging sand control Integrated effect were realized.Through the implementation of the technology above,comprehensive water cut of the oil wells decreased from former 93.2% to 70.6%,decreased by 22.6%,and the daily incremental oil production was 24.2ton,and the effective period among which in two wells were valid up to 50,75 days respectively.The influence of the reservoir physical property,fluid characteristics and construction technology on water plugging and sand control integration effect was analyzed,which provided evidence for developing water plugging measures at next step.