CAJ | 학술논문

裂缝发育程度是页岩气勘探和压裂开采的主要考虑因素之一；而裂缝的形成与构造特征密切关联。在对凤冈地区构造特征分析的基础上，对凤冈地区下寒武统牛蹄塘组黑色页岩的裂缝特征和主控因素进行了研究。认为凤冈地区褶皱、断裂发育，褶皱样式以隔槽式为主，具有典型的侏罗山式褶皱组合特点。区内多条断裂相互切割，具有亚扭性特征；牛蹄塘组黑色页岩中的裂缝以构造裂缝为主，且水平裂缝和低角度裂缝所占比例大，裂缝为局部充填或者全充填；页岩中的脆性矿物所占比例高，易于形成天然裂缝和人工压裂裂缝，提高页岩后期水力压裂效应的有效性，同时提高了页岩储层的渗透性。
렬봉발육정도시혈암기감탐화압렬개채적주요고필인소지일；이렬봉적형성여구조특정밀절관련。재대봉강지구구조특정분석적기출상，대봉강지구하한무통우제당조흑색혈암적렬봉특정화주공인소진행료연구。인위봉강지구습추、단렬발육，습추양식이격조식위주，구유전형적주라산식습추조합특점。구내다조단렬상호절할，구유아뉴성특정；우제당조흑색혈암중적렬봉이구조렬봉위주，차수평렬봉화저각도렬봉소점비례대，렬봉위국부충전혹자전충전；혈암중적취성광물소점비례고，역우형성천연렬봉화인공압렬렬봉，제고혈암후기수력압렬효응적유효성，동시제고료혈암저층적삼투성。
Fracture development is one of the main factors in the explorating and drilling of shale gas, and the formation of fracture is closely related to the structural characteristics.On the basis of analysis of the structural fea-ture of Fenggang area, Cambrian Niutitang Formation black shale fracture characteristics and main controlling fac-tors were studied.Thinking of Fenggang area′s fold, fault development, fold style to trough type, with typical Ju-rassic MT Jura type fold assemblage characteristics.Many faults cut each other, with sub shear characteristics;structural fractures are the main fracture types and horizontal and low angle fractures accounted for a large propor-tion, crack for partial filling or filling;shale of brittle minerals accounts for the proportion to be high, easy to create a natural fractures and artificial fracture, improving the effectiveness of shale late hydraulic fracturing effect, while improving the permeability of shale reservoir.