从冀中拗陷勘探历程和经验看临清拗陷勘探方向  

Deciding an exploration strategy in Linqing depression by analysing the exploration history and experience in mid-Hebei depression

作　　者：杨克绳[1] 

机构地区：[1]石油地球物理勘探局物探地质研究院

出　　处：《石油地球物理勘探》1997年第6期832-841,共10页Oil Geophysical Prospecting

摘　　要：杨克绳．从冀中拗陷勘探历程和经验盾临清拗陷勘探方向．石油地球物理勘探，1997，32（6）：832～841冀中拗陷的油气勘探大致可分为占凸起、打凹陷、探潜山三个阶段。在第一阶段以高点构造为目标钻探了固1井、华1井、华4井，在奥陶系见到了油气显示，说明了古生界地层有油气生成和聚集的地质条件，同时也认识到下步勘探应转向有利的负向构造单元。第二阶段选择了以凹中隆下第三系为突破口的一大批探井，钻探结果证明了凹中隆确实是有利勘探对象。第三阶段以新生古储的古潜山为目标，先钻了任4井，该井以日产1014t的奇迹获得成功，之后又打成了一批千吨以上的高产井，从而发现了任丘古潜山大油田。临清拗陷的地质条件与冀中拗陷不同，下第三系以红色地层为主，生油条件差，因此不能完全套用冀中的经验，应以古生界完整背斜原生油气藏为主要勘探方向。The hydrocarbon exploration in mid-Hebei depression underwent three phases:drilling on uplifts, exploration in subdepressions and discovering buried hills. Dur-ing the first phase, the boreholes (Gu-1, Hua-1 and Hua-4) were drilled on struc-tural highs. These boreholes found hydrocarbon show in Ordovician system, whichmeant that there were geological conditions for hydrocarbon origin and accumula-tion. Geologists came to realize that the further exploration should be in favourable negative tectonic units. During the second phase, a lot of exploratory boreholes were drilled which aimed at Palaeogene system within uplifts in subdepressions. These boreholes show that the uplifts in subdepressions are favourable exploration areas indeed. During the third phase, geologists focused their attention on the buried hills where hydrocarbon originated in younger formation but accumulate in old formation. Ren-4 borehole that produces 1014 ton oil per day was first drille successfully. Then many boreholes which produce respectively more than 1000 tonoil per day were drilled, so that the huge Renqiu buried-hill oil field was discovered satisfactorily. The geological conditions in Linqing depression are different from those in mid-Hebei depression; for example, the paleogene system in Linqing de-pression mainly consists of red formations, forming poor oil generating conditions. Consequently, the exploration experience in mid-Hebei depression can not be fully used in Linqing depression, where the main exploration object should be the origi-nal hydrocarbon accumulation in Palaeozoic whole anticline.

关 键 词：冀中拗陷 临清拗陷 勘探 油气勘探 

分 类 号：P618.130.8[天文地球—矿床学]