物化探综合找油方法在志丹探区的推广应用
Applications of physico-chemical prospecting to study of petroleum reservoirs in Zhidan area
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摘要: 由于资料的限制,前人对志丹探区勘探前景评价较低,加之沟谷、梁、峁纵横的地貌特征,勘探难度较大。通过勘探早期地质物化探综合找油方法实验,笔者总结了一套适合志丹探区石油地质特点的勘探方法组合和勘探程序:油气地球化学勘探(酸解烃、吸附烃、荧光光谱、紫外光谱、甲烷碳同位素、蚀变碳酸岩)→化探圈定的有利勘探区进行非地震物探(自然电位、伽玛能谱、高精度磁测、土壤测氡)→物探圈定的异常区进行电阻率测深勘探→地质物化探成果综合评价。实践证明,非地震物化探与地质研究相结合具有良好的勘探效果,与常规油气勘探方法相比,具有勘探成本低,周期短,成功率高的特点,尤其对寻找非构造油气藏。Abstract: It was estimated that the prospect perspective were weakness in Zhidan area once,since data was narrow,and prospect is difficult for complicated landforms (vale,ridge and replat).In this paper,by explored geo-physico-chemical prospecting method for looking for oil in prior prospect,the authors summ arize a suit of prospective technique and program,which is valid to oil-geology trait of Zhidan area and composed of: oil-gas geo-chemical prospect (acid degradation of hydrocarbon,absorbed-fluorescent spectrum,ultraviolet radiation spectrum,methane carbon-isotope)→non-seismic detection in favorable explorative area which confirmed by chemical prospect (matural potential,gamma energy spectrum,accurately magnetic analysis)→resistively prospecting in anom alous area which confirmed by physical-prospect→successful general evaluation of geo-physicochemical-prospect.Compared with routine petroleum exploitation,non-seismic physic-chemical prospect combined with geologic research show many obvious characters such as low-cost,short-period and high success rate,ect,especially to looking for non-struct ural oil-gas pool.
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Keywords:
- prior prospect /
- physico-chemical prospect /
- general evaluation
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