CAJ | 학술논문

中国西部发现的大量天然气多具有干酪根降解和原油裂解两种裂解气特征,选择有机质丰度高、成熟度低的新疆三塘湖盆地二叠系灰岩样品和川东北地区飞仙关组灰岩抽提油样,设计并完成了有机质成油、成气和油成气模拟实验,以考察这两种裂解气气源生气史和其对气藏的贡献.根据热模拟实验结果建立并标定了干酪根生油、生气及油成气的化学动力学模型,并运用该模型评价了川东北地区二叠系烃源岩生油史、生气史及三叠系飞仙关组古油藏裂解成气史.研究结果表明,川东北地区二叠系烃源岩主要生油时期为距今210～190 Ma,主要生气期为距今205～185 Ma(印支晚期),三叠系飞仙关组油裂解生气主要时期为距今165～150 Ma.根据两种裂解气的生气史,初步估算了两种裂解气的相对贡献,其中干酪根生气和油裂解生气相对比例分别为17%和83%.
중국서부발현적대량천연기다구유간락근강해화원유렬해량충렬해기특정,선택유궤질봉도고、성숙도저적신강삼당호분지이첩계회암양품화천동북지구비선관조회암추제유양,설계병완성료유궤질성유、성기화유성기모의실험,이고찰저량충렬해기기원생기사화기대기장적공헌.근거열모의실험결과건립병표정료간락근생유、생기급유성기적화학동역학모형,병운용해모형평개료천동북지구이첩계경원암생유사、생기사급삼첩계비선관조고유장렬해성기사.연구결과표명,천동북지구이첩계경원암주요생유시기위거금210～190 Ma,주요생기기위거금205～185 Ma(인지만기),삼첩계비선관조유렬해생기주요시기위거금165～150 Ma.근거량충렬해기적생기사,초보고산료량충렬해기적상대공헌,기중간락근생기화유렬해생기상대비례분별위17%화83%.
The natural gas produced in Feixianguan Formation in NE Sichuan Basin is characterized by kerogen cracking and oil cracking. Oil samples were taken from the Permian limestone in Santanghu Basin, Xinjiang, with high organic matter abundance and low maturity, and from the Feixianguan limestone in the NE Sichuan area. Oil and gas generation simulation experiments were designed and carried out to appraise the gas generation history and the relative contribution of the two-type sources. Based on simulation results, the chemical kinetic models involving oil-gas generation were built and the kinetic parameters of each model were demarcated. The oil and gas generation history and the oil cracking history were studied with above mentioned models. The results show that major oil generation period of the Permian source rock is between 210 Ma and 190 Ma, the major gas generation period is between 205 Ma and 185 Ma, and the major gas generation period of oil cracking in Feixianguan Formation is between 165 Ma and 150 Ma. The contributions of gas from kerogen cracking and oil cracking were estimated based on the gas generation history and the source rock characteristics. The contributions of the two cracking gases are 17% and 83%, respectively.