There is a law between the upgrading relations from trap reserve to possible, to probable and to proved reserves.

圈闭、预测、控制、探明储量之间的升级转化关系，具有一定的规律性。

youdao

Qinshui coal-bed gas field has the largest proved reserve abundance and the best production stabilization effects in China.

沁水煤层气田是国内已探明资源丰度最大、稳产效果最好的煤层气田。

youdao

In our country, the proved reserve of natural gas(including coal gas) is plinty. But the gas used as a single way for clean fuel, is not so good.

我国已探明的天然气储量（含煤层气）虽丰，但仅考虑作清洁燃料一种方式来利用不妥。

youdao

As noted previously, our original estimate disclosed on February 8 of the reserve for customer refunds proved to be inadequate after we performed additional analysis.

FORBES: Connect

The lands hold proved natural gas reserves of 3.4 trillion cubic feet and total reserve potential of 35 trillion cubic feet.

FORBES: Shale Gas Mania: BHP Pays Up In $15 Billion Deal For Petrohawk

In its earnings release Chesapeake downplays the reserve impairments, preferring to talk up the 5 trillion cubic feet of new proved reserves that it added this year.

FORBES: A Turnaround At Chesapeake Energy? Not Yet.