Organization
Exploration Branch Company, SINOPEC, Beijing 100029, China
摘要
在川东北山区针对碳酸盐岩储层开展的地震勘探取得了丰富的成果,但也面临诸多技术难点，主要有:碳酸盐岩裸露区地震资料采集难，高陡构造地震成像难，碳酸盐岩地震储层预测难。对难点形成的原因进行了分析，提出了解决这些难点的对策技术。这些对策技术可以归纳为以下4点：①加强碳酸盐岩裸露区地震波场传播规律研究，加大单点高密度地震观测、三维地震观测的研究和应用力度；②从地震采集、处理、解释一体化的角度进行综合研究，加强照明分析在地震采集中的实用性研究，加大高陡构造的构造样式研究，提高构造建模能力，在考虑表层模型与地下地质模型的基础上，开展三维叠前深度偏移应用研究；③加强多学科综合，探索地震-地质一体化的形式，提高碳酸盐岩地震储层识别和预测的精度，特别是碳酸盐岩优质储层的有效预测方法研究；④随着对精细勘探的要求，加大钻机、炸药、检波器、地震仪的研制和应用研究力度。
Abstract
In northeast Sichuan basin, carbonate formation is the major production formation of natural gas. Therefore, the seismic prospecting in carbonate formation is very successful. However, in carbonate rock exposed area, we have many technological difficulties such as in acquiring seismic data in exposed area, imaging the high-steep structures, and predicting reservoir of carbonate rock. Having analyzed the factors causing these difficulties, all the above countermeasures can be summed up into the following four aspects ① to strengthen the study on the seismic wave field propagation laws in carbonate rock exposed area, make great effort in single-point high-density seismic observation as well as 3-D observation, and ② to make study of the integration of seismic acquisition, process, and interpretation, strengthen the application study of illumination analysis in seismic acquisition, enhance the structural pattern study of high-steep structures, improve the structure modeling ability, and make application study of 3-D pre-stack depth migration by taking surface model and subsurface geologic model into consideration; ③ to strengthen the combination of multi disciplines to probe into the integration form of seismic-geology, improve the accuracy of seismic reservoir recognition and prediction in carbonate rock area, particularly that of the high-quality reservoirs; ④to strengthen the development and application of drilling rig, explosive, geophone, and seismometer in terms of the requirements for detailed exploration.
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