水泥工程
水泥工程
수니공정
CEMENT ENGINEERING
2014年
3期
24-25,33
,共3页
固井质量%微裂缝%自修复水泥%修复机理
固井質量%微裂縫%自脩複水泥%脩複機理
고정질량%미렬봉%자수복수니%수복궤리
well cementation quality%microannulus%self-healing cement%self-healing theory
油气井固井施工完成之后，环空水泥石在如憋压、射孔、压裂、酸化、修井以及水泥石收缩和地层蠕动等作用下将受到一定程度的破坏，产生裂缝或微环隙，造成油气井封固失效，影响油气资源的开采。试验将一种新型水泥外加剂--自愈合剂RZ引入油气井水泥，以探究其自修复能力。研究表明：被破坏后的自修复水泥石试样在养护8周后，渗透率降至0.2 mD以下。试验还结合相关微观分析手段对自修复水泥石进行了微观分析，提出了自修复水泥的修复机理，包括二次水化、结晶沉淀、渗透结晶、膨胀封堵等理论。
油氣井固井施工完成之後，環空水泥石在如憋壓、射孔、壓裂、痠化、脩井以及水泥石收縮和地層蠕動等作用下將受到一定程度的破壞，產生裂縫或微環隙，造成油氣井封固失效，影響油氣資源的開採。試驗將一種新型水泥外加劑--自愈閤劑RZ引入油氣井水泥，以探究其自脩複能力。研究錶明：被破壞後的自脩複水泥石試樣在養護8週後，滲透率降至0.2 mD以下。試驗還結閤相關微觀分析手段對自脩複水泥石進行瞭微觀分析，提齣瞭自脩複水泥的脩複機理，包括二次水化、結晶沉澱、滲透結晶、膨脹封堵等理論。
유기정고정시공완성지후，배공수니석재여별압、사공、압렬、산화、수정이급수니석수축화지층연동등작용하장수도일정정도적파배，산생렬봉혹미배극，조성유기정봉고실효，영향유기자원적개채。시험장일충신형수니외가제--자유합제RZ인입유기정수니，이탐구기자수복능력。연구표명：피파배후적자수복수니석시양재양호8주후，삼투솔강지0.2 mD이하。시험환결합상관미관분석수단대자수복수니석진행료미관분석，제출료자수복수니적수복궤리，포괄이차수화、결정침정、삼투결정、팽창봉도등이론。
After oil and gas well cementation, the annular cement will be damaged at a certain extent by impacts of pressure,perforation, fracturing,acidizing, workover, cement stone shrinkage and stratum peristaltic, which will results in crack or microannulus that cause oil and gas well cementation failure and affect gas and oil exploitation. In this experiment, a new type of cement admixture--RZ self-healing agent was introduced into oil well cement,to study its self-healing capability. The research shows that after 8 weeks of curing, permeability of the broken self-healing cement samples decreased to under 0.2mD. Combined with micro analysis method, the self-healing cement was analysed, and some self-healing theories like two hydration, crystallization, permeable crystallization, expansion plugging theory were proposed.
