發(fā)布時(shí)間：2019-05-13 07:38

【摘要】：在鹽穴地下儲(chǔ)氣庫注采井注氣排鹵階段,常因排鹵管柱內(nèi)部飽和鹵水析出晶體而導(dǎo)致排鹵管內(nèi)壁結(jié)晶、排鹵流量減小、注氣排鹵時(shí)間及成本增加,嚴(yán)重時(shí)甚至還可能導(dǎo)致排鹵管柱被鹽結(jié)晶堵死,無法繼續(xù)注采作業(yè)。為此,通過分析研究鹵水鹽結(jié)晶成因,發(fā)現(xiàn)過飽和度、溫度、鹵水流速及排鹵管內(nèi)壁表面粗糙度是影響排鹵管柱內(nèi)鹵水鹽結(jié)晶的主要因素,據(jù)此設(shè)計(jì)了相應(yīng)的實(shí)驗(yàn)。研究結(jié)果表明:①鹵水鹽結(jié)晶受溫度影響,鹵水在排鹵管中低速流動(dòng)且溫度降低1℃時(shí),管內(nèi)壁即會(huì)結(jié)晶;②排鹵流量越小,流體剪切力越小,生成的鹽結(jié)晶結(jié)構(gòu)不易被破壞,結(jié)晶現(xiàn)象越明顯;③相同條件下,排鹵管內(nèi)壁表面越光滑,新生成的晶核不易附著、生長,排鹵管內(nèi)壁生成的鹽結(jié)晶量越少。結(jié)論認(rèn)為:鹽穴地下儲(chǔ)氣庫注氣排鹵過程中,采用高溫淡水低流量反沖洗、升高注氣溫度以及排鹵管內(nèi)壁加涂油漆等措施,均有助于預(yù)防和解決因鹽結(jié)晶而帶來的堵管問題。
[Abstract]:In the stage of gas injection and dehalogenation in underground gas storage wells in salt hole, the crystallization of the inner wall of the pipe is often caused by the crystallization of saturated brine in the inner part of the pipe string, the discharge rate of brine decreases, and the time and cost of gas injection and removal of halogen are increased. In serious cases, it may even lead to halogen discharge pipe string blocked by salt crystallization and unable to continue injection-production operation. It is found that supersaturation, temperature, velocity of brine and surface roughness of the inner wall of the discharge pipe are the main factors affecting the crystallization of brine salt in the column of the discharge pipe, and the corresponding experiments are designed on the basis of the analysis and study of the origin of the crystallization of the brine salt. The results show that: (1) the crystallization of brine salt is affected by temperature. When the brine flows at low speed in the brine discharge tube and the temperature decreases by 1 鈩，

本文編號(hào)：2475708