地球物理学报
地毬物理學報
지구물이학보
2009年
11期
2903-2912
,共10页
裂缝性储层%裂缝开度%裂缝密度%裂缝粗糙度%电各向异性响应
裂縫性儲層%裂縫開度%裂縫密度%裂縫粗糙度%電各嚮異性響應
렬봉성저층%렬봉개도%렬봉밀도%렬봉조조도%전각향이성향응
Fractured reservoir%Fracture aperture%Fracture density%Fracture roughness%Electric anisotropy response
以水平裂缝分布的孔隙介质模型为基础,建立了水平裂缝面的平行裂缝分布和带粗糙表面的点接触裂缝模型,导出了两类裂缝模型的水平和垂直电阻率响应关系,分析了两类裂缝模型在没有围压和存在围压条件下的水平电阻率、垂直电阻率变化规律和电各向异性系数的变化特征.讨论了裂缝开度、裂缝密度和裂缝粗糙度等裂缝特征参数对裂缝性储层电各向异性的影响.为简化讨论,所有电性响应特征的分析都忽略了裂缝和孔隙表面的导电性和极化的影响.利用平行分布水平裂缝面模型和带粗糙面的裂缝模型,考察了围压条件下的裂缝性岩石的电各向异性响应特征,得到了对实际应用有意义的结果.
以水平裂縫分佈的孔隙介質模型為基礎,建立瞭水平裂縫麵的平行裂縫分佈和帶粗糙錶麵的點接觸裂縫模型,導齣瞭兩類裂縫模型的水平和垂直電阻率響應關繫,分析瞭兩類裂縫模型在沒有圍壓和存在圍壓條件下的水平電阻率、垂直電阻率變化規律和電各嚮異性繫數的變化特徵.討論瞭裂縫開度、裂縫密度和裂縫粗糙度等裂縫特徵參數對裂縫性儲層電各嚮異性的影響.為簡化討論,所有電性響應特徵的分析都忽略瞭裂縫和孔隙錶麵的導電性和極化的影響.利用平行分佈水平裂縫麵模型和帶粗糙麵的裂縫模型,攷察瞭圍壓條件下的裂縫性巖石的電各嚮異性響應特徵,得到瞭對實際應用有意義的結果.
이수평렬봉분포적공극개질모형위기출,건립료수평렬봉면적평행렬봉분포화대조조표면적점접촉렬봉모형,도출료량류렬봉모형적수평화수직전조솔향응관계,분석료량류렬봉모형재몰유위압화존재위압조건하적수평전조솔、수직전조솔변화규률화전각향이성계수적변화특정.토론료렬봉개도、렬봉밀도화렬봉조조도등렬봉특정삼수대렬봉성저층전각향이성적영향.위간화토론,소유전성향응특정적분석도홀략료렬봉화공극표면적도전성화겁화적영향.이용평행분포수평렬봉면모형화대조조면적렬봉모형,고찰료위압조건하적렬봉성암석적전각향이성향응특정,득도료대실제응용유의의적결과.
Based on the model of porous medium with horizontal fractures,two fractured reservoir models have been suggested which considered smooth-surface parallel fractures and point-welded rough-surface fractures,and the vertical and horizontal electric resistivity response equations have been derived from the Ohm law. According to the response equations derived above,the variation characteristics of the horizontal and vertical resistivity and electrical anisotropic coefficient of the two fractured models under the conditions of free pressure and confining pressure have been analyzed. Furthermore,we have discussed the effect of geometrical parameters,such as fracture aperture,fracture density and fracture surface roughness and others,on electric anisotropy of the fractured reservoir. For simplifying the discussion,we have ignored the influences of surficial conducting mechanism and polarization effect of the fracture and pore surfaces on the electric anisotropy. Finally,we have examined the response characteristics of the electric resistivity and electric anisotropy under condition of confining pressure based on the smooth fracture model and welded rough fracture models,and meaningful results which can be applied to practical application have been obtained.