CAJ | 학술논문

在基于成像测井、岩心及薄片资料对玉北地区构造裂缝进行识别并总结其发育规律的基础上，根据裂缝切割关系、充填方解石阴极发光及包裹体特征划分裂缝发育期次，并应用有限元法数值模拟不同裂缝发育期古构造应力场特征，结合裂缝发育力学机制，分析不同时期断层－褶皱控制下的裂缝成因模式。研究结果表明，玉北地区奥陶系构造裂缝主要沿高陡带发育，其发育程度、产状受断层、褶皱共同控制，共发育4期裂缝，其中加里东中期Ⅰ、Ⅲ幕裂缝受断层主控、加里东晚期至海西早期裂缝受断层与褶皱共同控制、海西晚期裂缝主要受褶皱控制；与断裂走向较一致的高角度裂缝对储层发育贡献最大，加里东晚期—海西早期及海西晚期两期裂缝发育区，更有利于油气聚集。
재기우성상측정、암심급박편자료대옥북지구구조렬봉진행식별병총결기발육규률적기출상，근거렬봉절할관계、충전방해석음겁발광급포과체특정화분렬봉발육기차，병응용유한원법수치모의불동렬봉발육기고구조응력장특정，결합렬봉발육역학궤제，분석불동시기단층－습추공제하적렬봉성인모식。연구결과표명，옥북지구오도계구조렬봉주요연고두대발육，기발육정도、산상수단층、습추공동공제，공발육4기렬봉，기중가리동중기Ⅰ、Ⅲ막렬봉수단층주공、가리동만기지해서조기렬봉수단층여습추공동공제、해서만기렬봉주요수습추공제；여단렬주향교일치적고각도렬봉대저층발육공헌최대，가리동만기—해서조기급해서만기량기렬봉발육구，경유리우유기취집。
Based on the identifying of fractures by the use of FMI, cores and slides data, the development law of structural fractures were summarized. The stages of structural fractures were classified according to the cross relation, the characteristics of cathodeluminescence and inclusions, and then the finite element method was applied to simulating the tectonic stress field mathematically in each fracture developing periods, also the genetic mechanism of structural fractures controlled by fault?fold in different periods were analyzed combining with the mechanical mechanism. The results showed that the structural fractures mainly developed along the high?steep zone in Yubei area, and their development degree and occurrence were controlled by fault and fold. Four stages of structural fractures recognized in this area: the fractures developed in I and III activities of the Middle Caledonian were mainly controlled by fault, the fractures developed in the Late Caledonian?Early Hercynian were controlled by fault and fold, and the fractures were mainly controlled by fold in the Late Hercynian. The fractures with high angle and parallel with the fault gave more contributions to reservoir development, and the fractures which developed both in the Late Caledonian?Early Hercynian and the Late Hercynian gave more conducive atmosphere to oil?gas accumulation.