昌吉致密油长位移水平井安全延伸长度预测
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摘要
致密油开发目前多采用工厂化长位移水平井的方式,水平井段的长度直接影响到致密油藏开发的效率。分析了制约致密油水平井水平段延伸长度的主要因素,采用实测数据反演摩阻系数法预测井口载荷以及考虑接头环空压耗的计算模型,指出额定泵压是水平段延伸长度的主要限制因素,较为准确地预测了致密油长位移水平井水平段安全延伸长度。在额定泵压30MPa,排量14L/s,完井井眼尺寸?152.4 mm的情况下,新疆昌吉致密油水平井的最大安全延伸长度为3 000 m。
The tight oil fields are now mostly developed by well factory method with long lateral horizontal wells. The length of horizontal section has a direct effect on the tight reservoir development efficiency. The main factors that impact the horizontal section length in tight oil formation are analyzed. The wellhead loads are calculated by inverted friction coefficient through measured data. The tool joint pressure drop has been considered in annular pressure model. Pointed that rated pump pressure is a major limiting factor to ettend the length of the horizontal section. Thereby the safety horizontal section of horizontal wells in tight oil formation is predicted accurately. Given the rated pump pressure of 30 MPa,displacement of 14 L / s and the borehole size of ?152. 4 mm,the maximum safety horizontal section length for horizontal well in tight oil formation in Xinjiang is 3 000 m.
The tight oil fields are now mostly developed by well factory method with long lateral horizontal wells. The length of horizontal section has a direct effect on the tight reservoir development efficiency. The main factors that impact the horizontal section length in tight oil formation are analyzed. The wellhead loads are calculated by inverted friction coefficient through measured data. The tool joint pressure drop has been considered in annular pressure model. Pointed that rated pump pressure is a major limiting factor to ettend the length of the horizontal section. Thereby the safety horizontal section of horizontal wells in tight oil formation is predicted accurately. Given the rated pump pressure of 30 MPa,displacement of 14 L / s and the borehole size of ?152. 4 mm,the maximum safety horizontal section length for horizontal well in tight oil formation in Xinjiang is 3 000 m.
引文
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[3]汪志明,郭晓乐.大位移井水力延伸极限研究[J].钻采工艺,2008,31(4):1-3.
[4]贺志刚,付建红,施太和,等.大位移井摩阻扭矩力学模型[J].天然气工业,2001,21(5):52-54.
[5]孙连忠,臧艳彬,高德利,等.复杂结构井钻柱解卡参数分析[J].石油机械,2014,42(3):19-23.
[6]郭晓乐,汪志明.大位移井循环压耗精确计算方法研究及应用[J].石油天然气学报,2008,30(5):99-102.
[7]徐坤吉,熊继友,陈军,等.深井水平井水平段水力延伸能力评价与分析[J].西南石油大学学报:自然科学版,2012,34(6):101-106.
[8]杨晓莉,刘素君,樊晓萍.大位移井井眼净化的理论与方法[J].钻采工艺,2005,28(6):24-26.
[9]杨宇平,杨成新,董建辉,等.水平井、大位移井井眼净化技术研究[J].石油机械,2012,40(8):19-23.