Abstract: There are more than 140 minor Meso-Cenozoic remnant basins distributed along deep fault zones in south-east China. Some of these basins have abundent oil and gas reserves and high yielding traps, although the areal extent of this petroliferous basins is only 800～1,000 sq. km. The structural and lithologic characteristics of the hydrocarbon accumulations in these basins are briefly summarized as: 1. Distribution along deep fault zones. 2. Widely distributed thick source rocks. 3. Well developed sand bodies. 4. Higher geothermal gradients and 5. Multiple trap styles. The Meso-Cenozoic remnant basins contain thick sequences of deepwater,lacustrine shales which are the major source rocks for the hydrocarbon accumulations. The organic-rich, dark, muddy sediments were deposited in the deeper parts of the lake basins. Therefore, the main source-rocks are wellpreserved and have a wide distribution, although the basins were uplifted and eroded subsequent to shale deposition, resulting in the destructions of the basin edges. Most of the minor remnant basins occur as single-faulted half-grabens as a result of successive development of the fault along one side of the basin. But double faulted grabens also developed in some basins. The well-developed minor remnant basins can be further divided into three structural units; 1. A step-faulted belt on the steeper flank. 2. A central, low buried-h-ill belt and 3. A monoclinal slope belt on the gentler flank. Examples of this type of basins are the Damintun basin, Langgu basin, Nanpu basin, Sulu basin, Beishe basin and Sansui basin. The poorly-developed remnant basins are composed of 1. A step-faulted belt on the steeper flank. 2. A central trough and 3. A monoclinal slope belt on the gentler flank. Examples of this type of basins are the Biyang basin, Changwei basin, Qianjiang basin, Yuanjiang basin and Momin Basin.

摘要： 中国东、南部沿着一些深大断裂带分布有140多个中、新生代残留型小盆地。其中若干已证实富含油气。每个盆地面积仅800～1,000平方千米,但储量丰度高,并有多种类型的高产圈闭。这些盆地油气富集的构造和岩性特点如下:1.深大断裂带控制残留型盆地的形成与发育;2.生油岩堆积厚,分布范围广;3.四周物源多,砂体发育;4.地温梯度较高;5.油气圈闭类型多。残留型含油气盆地其原始湖盆沉积面积大于目前盆地范围。在生油岩沉积期,湖盆稳定下陷,有机质得到有利的保存和转化。后期盆地抬升剥蚀后,其边缘相已被削蚀掉,但保存了主要的生油岩体和储集岩体。第三系残留型小含油气盆地由于一侧为长期发育的生长断层,所以盆地结构一般为单断式的箕状断陷,但亦有双断式的地堑断陷。两类盆地都具有明显的分带性:发育较全的箕状凹陷具有1.断阶带;2.中央低潜山带;3.斜坡带。如大民屯凹陷、廊固凹陷、南堡凹陷、束鹿凹陷、百色盆地和三水盆地等都是这种类型。发育不太完整的箕状凹陷具有:1.断阶带;2.中央凹槽带,3.斜坡带。如泌阳凹陷、昌淮凹陷、潜江凹陷、沅江凹陷和茂名盆地等都是这种类型。