SY-T6596-2004-气田水回注方法.pdf

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1、ICS75.020E14备塞昙.14078-2004SY中华人民共和国石油天然气行业标准SY/T6596-2004气田水回注方法Recommendedpracticeforproduced一waterreinjectioningasfield2004一07一03发布2004一11一01实施国家发展和改革委员会发布SY/T6596-2004目次前言································································，·······················，···················⋯⋯

2、n1范围····························································································，················⋯⋯12规范性引用文件······································，················································.......⋯⋯13术语和定义···································，·····················

3、······，·······························，··⋯⋯l4气田水回注层和回注井的评选要求·····················，····················⋯⋯，⋯，.···.............⋯⋯15气田水回注推荐水质指标··························································.········..............⋯⋯26达标回注水质检测分析方法与推荐水质处理工艺流程·····································

4、···········⋯⋯2参考文献·······························································，·············································⋯⋯4SY/T6596-2004月U吕本标准由采油采气专业标准化委员会提出并归口。本标准起草单位:中国石油天然气股份有限公司西南油气田分公司采气工程研究院。本标准起草人:蒲蓉蓉、李小蓉、师春元、杨旭、隆守惠。SY/T6596-2004气田水回注方法1范围本标准规定了天然气田水回注井和回注层的评选要求、推荐水质指标

5、、达标回注水质检测分析方法与推荐水质处理工艺方法。本标准适用于砂岩和碳酸盐岩天然气田水排污回注。2规范性引用文件下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件，其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标准，然而，鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准。GB/T692()水质pH值的测定玻璃电极法GB/T11901水质悬浮物的测定重量法GB/T16488水质石油类和动植物油的测定红外光度法SY/T5329碎屑岩油藏注水水质推荐指标及分析方法3术语和定义

6、下列术语和定义适用于本标准。3.1悬浮固体suspendedsolid采用平均孔径为。45pm的纤维树脂微孔膜过滤过程中，经汽油或石油醚溶剂洗去原油后，残留于微孔膜上不溶于油水的物质。3.2悬浮物颗粒直径中值mid-valueofsuspendedparticles'diameter水中颗粒的累积体积占颗粒总体积50%时的颗粒直径。3.3含油oilcontent在酸性条件下，水中可以被汽油或石油醚萃取出的石油类物质。4气田水回注层和回注井的评选要求4.1回注层的评选要求4.1.1优先选择枯竭层或废弃层。4.1.2根据当地水文地质资料，回注后不对淡水层造成影响。4

7、.1.3有足够的储集空间，能满足较长期的回注要求。4.1.4上下隔离层不窜漏，注人层横向连通性好，满足总注人量波及范围内无断层、无地表露头或出露点。4.1.5有足够的吸渗能力，不应造成较高的泵注回压，不应引起回注水反注和外泄。4.1.6回注水与回注层岩性及地层水配伍性好，不应形成二次沉淀堵塞地层4.2回注井的评选要求SY/T6596-20044.2.1套管技术状况良好，固并质量好、无窜槽。4.2.2油层套管应能够承受设计注人压力4.2.3井口装置密封良好，能承受设计或额定压力，满足泵注要求5气田水回注推荐水质指标5.1水质基本要求5.1.1回注水水质稳定，与地层

8、水相混合后不产生沉淀。5