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一般认为,碳酸盐岩排烃过程中,压实作用不是其主要机理,而由干酪根及其生成的油气的热膨胀引起的增压作用起主要作用。但我国大部分地区碳酸盐岩中的有机碳含量较低(平均低于1%),由此其增压作用必然有限,所以直到目前对低有机质含量的碳酸盐岩排烃问题仍没有得到很好的解决。对塔里木盆地某井奥陶系碳酸盐岩烃源岩(埋深4670～5230m)中的泥质条带、缝合线缝隙物和纯碳酸盐基质(50个样品)中的有机质分布特征的实验研究表明:高有机质丰度的缝合线缝隙物(TOC 平均1.92%)和泥质条带(TOC 平均1.14%)是碳酸盐岩地
It is generally believed that during hydrocarbon expulsion, compaction is not the main mechanism, but pressurization due to the thermal expansion of kerogen and its generated hydrocarbons plays a major role. However, the organic carbon content of carbonate rocks in most parts of China is relatively low (less than 1% on average), so its supercharging effect is bound to be limited. So far, there is still no problem of hydrocarbon emission from carbonate reservoirs with low organic content Get a good solution. Experiments on Distribution Characteristics of Organic Matter in Argillaceous Carbonate Source Rocks (4670 ~ 5230m Buried Depth in Tarim Basin) for Argillaceous Strips, Suture Seams and Pure Carbonate Substrates (50 Samples) Studies have shown that the abundance of suture seams (TOC average 1.92%) and argillaceous bands (TOC average 1.14%) are characterized by carbonate