柴西地区古近系—新近系含气系统模拟及勘探方向

发布时间：2018-07-02 22:23

本文选题：柴西 + 含气系统　；参考：《天然气地球科学》2017年01期

【摘要】：柴西地区天然气具备较大的勘探潜力,然而主要生气中心、主力气源岩、天然气成藏关键时刻尚未明确,制约了天然气勘探进程。选取在含油气系统模拟中应用最广的PetroMod软件,输入相关参数,恢复剥蚀量,建立柴西地区古近系—新近系三维地质模型,运行后得到各套烃源岩成熟度平面图、生气强度图、运聚方向图以及生气量,由此可以确定主力气源岩为下干柴沟组上段(E~2_3)和上干柴沟组(N_1);指出天然气平面分布受源岩成熟度的控制,天然气位于成熟—高成熟源岩区及附近;主要生气凹陷为红狮、小梁山和茫崖东3个凹陷,围绕生气凹陷周缘的构造高部位是天然气的运聚方向;主要生气期为第四纪(Q_(1+2))和上新世晚期(N~3_2),关键时刻为N~2_2末。在以上研究的基础上,指出狮子沟—油砂山—英东—大乌斯、油泉子—开特米里克—油墩子和小梁山—南翼山—大风山构造带是下步柴西地区天然气勘探的重点领域。
[Abstract]:Natural gas in the west of Qaixi area has great exploration potential, but the main gas generation center, the main gas source rock and the key time of gas reservoir formation are not clear, which restricts the process of natural gas exploration. PetroMod software, which is widely used in oil and gas system simulation, is selected to input relevant parameters, restore denudation amount, and establish a three-dimensional geological model of Paleogene and Neogene in the western Chaixi area. After operation, the maturity maps and gas intensity maps of each set of hydrocarbon source rocks are obtained. The migration and accumulation pattern and the amount of gas generation can be used to determine that the main gas source rocks are the upper member of the Lower Ganchaigou formation (E ~ (2 +) and the Shangganchaigou formation (N _ 1), and it is pointed out that the natural gas distribution is controlled by the maturity of the source rocks, and the gas is located in and near the mature-high mature source rocks. The main gas generating sag is Hongshi, Xiaoliangshan and Mangya East sag. The high tectonic position around the gas sag is the direction of gas migration and accumulation, and the main gas generation period is Quaternary (Q12) and late Pliocene (Nni3Stack2), and the critical time is Nt2Snap2. On the basis of the above research, it is pointed out that the Shizigou-oil sand mountain-Yingdong-Daus, Youquanzi-Katermik-Youduzi and Xiaoliangshan-Nanyishan-Gengshan structural belt are the key areas of natural gas exploration in Xiapu west Chaixi area.
【作者单位】：中国地质科学研究院地质力学研究所;中国石油勘探开发研究院廊坊分院天然气地质所;首都师范大学附属中学;
【基金】：国家大型油气田及煤层气开发科技重大专项(编号:2016ZX05007) 中国石油重大科技专项“柴达木盆地建设高原大油气田勘探开发关键技术研究与应用”(编号:2016E-0102)联合资助
【分类号】：P618.13

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