论文部分内容阅读
火14井北断块构造位于准噶尔盆地东部隆起沙帐断褶带北端,目的层为二叠系平地泉组,主体处于石炭系火山岩逆掩推覆体之下,由于受上覆不等厚火山岩高速层的影响,该断块内二叠系层速度横向变化快、干扰波发育、地震资料品质差。复杂的速度变化制约了对断块内构造形态的认识及该区油气勘探的突破。对此,分别采用地质模型正反演技术分辨出了火山岩体其展布和接触关系,在此基础上,分析其波形及属性特征,落实了火山岩推覆体掩伏构造形态和构造高点,同时用变速成图技术提高了构造成图精度。
The north block of Well 14 in the north of the Junggar Basin is located at the northern end of the Shazhang fault fold in the eastern part of the Junggar Basin. The target layer is the Pingdiquan Formation of the Permian. The main body is under the thrust cover of the Carboniferous volcanic rocks. Due to the unequal overburden volcanic rocks High-velocity layer, the velocity of Permian layer in the fault block changes rapidly laterally, the disturbance wave develops and the seismic data quality is poor. The complicated velocity change restricts the understanding of the tectonic configuration in the fault block and the breakthrough of oil and gas exploration in this area. In this regard, respectively, the use of geological model inversion technique to distinguish the volcanic rock distribution and contact relationship, on this basis, the analysis of its waveform and attribute characteristics, implementation of the volcanic nappe body subduction structure and structural high point, At the same time using variable speed mapping technology to improve the accuracy of the structure map.