编辑-地球科学江南体育网页版堆栈交换江南电子竞技平台

你不是登录。你的编辑将被放置在一个队列,直到同行评议。

我们欢迎编辑,使读者更容易理解和更有价值。因为社区成员审查编辑,请尽量使文章更好比你怎么发现,例如,通过修正语法或添加额外的资源和超链接。

下切河谷和烃潜力

砂岩体与下切河谷是良好的油气储层。

谁能详细说明这句话背后的原因吗?

回答

* *砂岩体在下切河谷*能*良好的油气储层。* *下切河谷形式在沿海平原和/或大陆架相对海平面下降的河流和海洋过程(如河流侵蚀、溯源侵蚀)。这里有一些海岸平原的切口(Orari河)[1]在新西兰,看看那些在沙洲!! [Orari河、新西兰][2]的警告下切河谷也可以充满泥浆(non-reservoir),有几个原因很多油气领域发现了下切河谷:*切口空间集中泥沙输送到崖边的斜率。如果粗泥沙(储层孔隙度保存,因此需要)被困在货架上,会有更多的切口。*沉积物只呆哪里有(“住宿”)(http://wiki.aapg.org/Sequence_stratigraphy住宿)。一个大洞,之前没有(像一个新谷)住宿。*谷作为容器,所以渠道倾向于有高比率的厚度宽度。*由于这些原因,山谷有时充满多层砂/泥继任的问题。很多水库! * After the sea-level fall comes sea-level rise, or ['transgression'](https://en.wikipedia.org/wiki/Marine_transgression). Everything is flooded, and you're back to a marine environment. There's mud everywhere and so now you have a top seal. * It's relatively easy to connect a valley to a marine [source rock][3], either directly updip via porosity, or via faults or other conductors. * Unlike [basin-floor fans][4], which can also be good reservoirs, incised valleys are on the shelf and might still be beneath the modern shelf. This means there are many more options for drilling wells targeting them, and it's much cheaper and easier. * Compared to unincised systems, incised valleys are relatively easy to spot in well logs and even on seismic. So they are conspicuous, and easily diagnosed. * Since the start of the incised valley craze in the 1990s, incised valleys have been deliberately targeted, so there's probably some sample bias: lots of wells means lots of discoveries! The last little gem is that, even if there's no luck exploring on the shelf, incised valleys might mean that coarse sediment has been delivered to the basin floor, opening up a promising play there too. [1]: https://www.google.ca/maps/place/New+Zealand/@-44.2282751,171.3792034,9038m/data=!3m1!1e3!4m2!3m1!1s0x6d2c200e17779687:0xb1d618e2756a4733 [2]: http://i.stack.imgur.com/cGW3V.jpg [3]: https://en.wikipedia.org/wiki/Source_rock [4]: http://www.sepmstrata.org/Terminology.aspx?id=basin-floor%20fan

编辑总结

取消

添加一个评论 |

正确的小错误或错误
澄清的意思,而不更改它
添加相关资源或链接
总是尊重作者的意图
不使用编辑与作者回复

创建代码用引号”或式子~篱笆
' ' '
像这样
' ' '
添加语言标识符来突出显示的代码
”“python
def函数(foo):
打印(foo)
' ' '
把段落之间的回报
在结束linebreak添加2个空间
_italic_或* *的* *
报价将>开始的
做链接(尽量使用https)
< https://example.com >
(例子)(https://example.com)
< a href = " https://example.com " > < / >示例
MathJax方程罪\ \ ^ 2θ美元

格式帮助»
回答帮助»

MathJax帮助»