CAJ | 학술논문

依据露头观测和成像测井数据，揭示鲁西地区太古界裂缝系统的成因及类型，将裂缝产状数据与区域构造背景结合分析，同时依据典型断裂-裂缝剖面的观测统计，对太古界构造裂缝的形成时期及发育规律进行剖析。结果表明：鲁西地区太古界裂缝系统主要由区域构造裂缝和局部构造裂缝组成；区域构造裂缝形成时期主要为中-新生代，其中低角度裂缝形成于印支期，高角度裂缝形成于燕山-喜山期；局部构造裂缝的发育虽不具有普遍性，但对局部地区太古界储集性能的改善意义重大；规模相近但力学性质不同的断裂对储层的改造程度和影响范围存在差异；压性断裂最好，压扭性断裂次之，张扭性断裂最差；断裂影响范围内裂缝面密度的显著增大主要表现为区域构造裂缝的加密或派生新的构造裂缝，新生裂缝通常与断裂平行或小角度斜交。
의거로두관측화성상측정수거，게시로서지구태고계렬봉계통적성인급류형，장렬봉산상수거여구역구조배경결합분석，동시의거전형단렬-렬봉부면적관측통계，대태고계구조렬봉적형성시기급발육규률진행부석。결과표명：로서지구태고계렬봉계통주요유구역구조렬봉화국부구조렬봉조성；구역구조렬봉형성시기주요위중-신생대，기중저각도렬봉형성우인지기，고각도렬봉형성우연산-희산기；국부구조렬봉적발육수불구유보편성，단대국부지구태고계저집성능적개선의의중대；규모상근단역학성질불동적단렬대저층적개조정도화영향범위존재차이；압성단렬최호，압뉴성단렬차지，장뉴성단렬최차；단렬영향범위내렬봉면밀도적현저증대주요표현위구역구조렬봉적가밀혹파생신적구조렬봉，신생렬봉통상여단렬평행혹소각도사교。
Based on outcrop observations and image logging data, the origin and types of Archaean rocks fracture were re-vealed in west Shandong. Integrating a large amount of measurements for fracture properties, this research focuses on the ge-netic type, the formation date and the characteristics of Archaean fracture systems in the region. Formation period and distri-bution of structural fracture were studied by drawing connection between the regional tectonic setting and the fracture occur-rence inferred from observations of screened section from the typical faults and the associated fractures. The results show that the Archaean fracture system in west Shandong consists of two genetic types. One is the regional tectonic joint, which was formed in the Meso-Cenozoic era. The formation of low and high angle joint was in the Indo-Chinese epoch and the Yanshan-Himalayan period, respectively. The other type is local structure fracture, which is not typical but of great significance in im-proving the Archaean reservoir quality in some areas. Faults with similar length scale but different mechanical properties have different influences on reservoir properties:the tenso-shear faults seem to have minimal effects, the compressive faults have the maximum effects, and the compresso-shear faults are in the middle. The increase of the fracture areal density within the influenced fault mainly causes more infill of regional tectonic joints or new structure fractures, which are generally parallel to or at a small angle oblique to the fractures.