CAJ | 학술논문

为明确潜山变质岩的裂缝发育特征,以酒西盆地鸭儿峡油田志留系潜山变质岩油藏为例,综合利用成像测井、岩心观察、大量的薄片统计和核磁共振手段对裂缝方向、充填程度、裂缝参数和核磁共振响应特征进行研究系统研究. 结果表明,研究区裂缝方向主要为北西方向和北东,裂缝类型以斜交缝为主,其次为垂直缝,水平缝发育程度差,裂缝充填严重. 斜交缝的分布频率平均为1.01条/m,垂直缝为0.19条/m;水平缝为0.26条/m . 裂缝宽度平均为0.775 mm,裂缝长度平均为6.56 cm . 垂直缝的裂缝宽度最大,斜交缝中开口缝比例最高. 具有储集性能的裂缝性变质岩在核磁共振T2谱主要为双峰和三峰态,有利目标区寻找应该以北东向裂缝发育区为重点.
위명학잠산변질암적렬봉발육특정,이주서분지압인협유전지류계잠산변질암유장위례,종합이용성상측정、암심관찰、대량적박편통계화핵자공진수단대렬봉방향、충전정도、렬봉삼수화핵자공진향응특정진행연구계통연구. 결과표명,연구구렬봉방향주요위북서방향화북동,렬봉류형이사교봉위주,기차위수직봉,수평봉발육정도차,렬봉충전엄중. 사교봉적분포빈솔평균위1.01조/m,수직봉위0.19조/m;수평봉위0.26조/m . 렬봉관도평균위0.775 mm,렬봉장도평균위6.56 cm . 수직봉적렬봉관도최대,사교봉중개구봉비례최고. 구유저집성능적렬봉성변질암재핵자공진T2보주요위쌍봉화삼봉태,유리목표구심조응해이북동향렬봉발육구위중점.
In order to make fracture characteristics of metamorphic rock clear,taking the metamorphic rock oil reservoir in Silurian system of Yaerxia oilfield,Jiuxi basin as an example,we studied the fracture orientation,filling degree,fracture parameters and nuclear magnetic resonance response characteristics,using imaging logging,core observation,a lot of statistics,and nuclear magnetic resonance(NMR)methods. The results show that,main fracture directions are the northwest and northeast,fracture type is given priority to with oblique fractures,followed by a vertical fractures,development degree of horizontal fractures is poor,filling degree of fractures are serious. Oblique fractures distribution frequency averaged 1.01 strip/m,vertical fractures is 0.19 strip/m,horizontal fractures is 0.26 strip/m. The average width of fracture is 0.775 mm,and the average length fracture is 6.56 cm. The width of vertical fracture is biggest,while the open fracture percentage in oblique fractures is highest. The T2 spectrum of metamorphic rocks having reservoir capacity mainly presents two peaks and three peaks. Favorable target area should be looked for the north east fracture development zone.