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正确认识化探技术在隐蔽油气藏勘探中的有效性和总结成功的隐蔽油气藏勘探实例,对我国现阶段隐蔽油气藏勘探具有十分重要的作用和意义。选择渤海湾盆地临南某断块隐蔽油气藏,利用化探精查技术对研究区化探样品酸解烃甲烷、重烃指标地球化学场特征进行描述和研究:该区存在稳定的酸解烃甲烷、重烃指标地球化学场,两酸解烃指标地球化学场亦具有良好的空间重现性,它们均以稳定的环状异常模式有效地指示了下伏断块隐蔽油气藏,该断块隐蔽油气藏的油气渗漏(油气微渗漏、夏口断层油气渗漏)与油气藏上方两酸解烃指标异常间存在着“因果”关系。鄂尔多斯盆地、准噶尔盆地等地区油气化探实例说明:化探技术在这些地区隐蔽油气藏勘探中取得良好应用效果的基础是化探方法选择、有效化探指标的选取和组合、化探指标综合异常信息提取、探区相关石油地质认识等多种因素的紧密结合。临南断块隐蔽油气藏油气化探的研究认识和鄂尔多斯盆地、准噶尔盆地等地区隐蔽油气藏的化探实例表明:化探技术可在隐蔽油气藏勘探中发挥重要作用。
Correctly understanding the effectiveness of the geochemical exploration technology in subtle reservoir exploration and summarizing the successful subtle reservoir exploration are of great significance and significance to the exploration of the subtle reservoir in the present stage of our country. The subtle reservoirs of a fault block in the Linnan area of the Bohai Bay Basin are selected to describe and study the geochemical field characteristics of acid-base-pyrolysis methane and heavy hydrocarbon in the geochemical exploration samples in the study area by using the geochemical exploration technique. There are stable acid-hydrolyzed hydrocarbons Methane, heavy hydrocarbon indicator geochemical field, diacid-releasing hydrocarbon indicator geochemical field also have good spatial reproducibility, they are effectively cyclic anomalous pattern of subduction block subtle reservoirs, the fault block There is a “causal relationship” between oil and gas seepage (micro-oil leakage and Xiakou oil-gas leakage) of the subtle reservoirs and the anomalies of the two acid-withdrawing hydrocarbons above the reservoir. Geophysical and geochemical exploration in the Ordos Basin and Junggar Basin shows that the basis for the good application results of the geochemical exploration in subtle reservoir exploration in these areas is the selection of geochemical exploration methods, the selection and combination of effective geochemical exploration indicators, the comprehensive anomaly of geochemical indicators Information extraction, exploration related to the geological understanding of petroleum and other factors in close conjunction. The understanding of geochemical exploration of subtle reservoirs in Linnan fault block and the geochemical exploration of subtle reservoirs in the Ordos Basin and Junggar Basin show that the geochemical exploration technique can play an important role in subtle reservoir exploration.