正宁油田注水与地层水配伍性分析及防垢技术研究  

Analysis of water injection and formation water compatibility and anti-scale technology research in Zhengning oilfield

作　　者：谢非 王赐勋 白云思雨 XIE Fei;WANG Cixun;BAI Yunsiyu(School of Earth Sciences and Engineering,Xi'an Shiyou University,Xi'an Shaanxi710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi'an Shiyou University,Xi'an Shaanxi 710065,China)

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,陕西西安710065

出　　处：《石油化工应用》2024年第12期92-98,共7页Petrochemical Industry Application

摘　　要：在对正宁油田长2、长8地层水以及宁一站直罗组注水进行水质分析的基础上,进行单一水样和混合水样的结垢趋势预测,结合静态配伍实验可知:采出水均为含有成垢离子的CaCl_(2)水型,易生成CaCO_(3);直罗组注水与长8地层水、长2与长8地层水按照不同比例混合后,均产生了CaCO_(3)垢和CaSO4垢,且结垢物以CaCO_(3)垢为主;直罗组注水与长2地层水混合后有较少的CaCO_(3)垢产生,无CaSO4垢。针对长8、长2、直罗组注水两两混输下的CaCO_(3)和CaSO4结垢问题,本文选择了聚羧酸盐类CQ-ZG02、有机磷酸盐类ZG-558、HZG-05三种阻垢剂,对其进行阻垢效果的测试,最后优选了阻垢率均大于80.00%的阻垢剂HZG-05,综合来看,HZG-05在三种水样混合的情况下,起到了更好的阻垢效果。On the basis of the water quality analysis of the Chang 2 and Chang 8 formation water in Zhengning oilfield and the water injection of the Zhiluo formation of Ningyi station,the scaling trend of single water samples and mixed water samples was predicted,and the results showed that the produced water was calcium chloride water type containing scale ions,which was easy to generate calcium carbonate.After the water injection of the Zhiluo formation was mixed with the water of Chang 8 formation and the formation water of Chang 2 and Chang 8 according to different proportions,calcium carbonate scale and calcium sulfate scale were produced,and the scale was mainly calcium carbonate scale.After the water injection of the Zhiluo formation was mixed with the water of the Chang 2 formation,there was less calcium carbonate scale,and there was no calcium sulfate scale.In order to solve the problem of calcium carbonate and calcium sulfate scaling under the mixed infusion of water injection in Chang 8,Chang 2 and Zhiluo groups,polycarboxylate antiscalants CQ-ZG02,organophosphate antiscalants ZG-558 and HZG-05 were selected to test their antiscaling effects,and finally antiscalants HZG-05 with descaling rates greater than 80.00%were optimized.In summary,HZG-05 has a better descaling effect when three kinds of water samples are mixed.

关 键 词：地层水 配伍性 结垢预测 阻垢剂 

分 类 号：TE358.5[石油与天然气工程—油气田开发工程]