A lot of Jing is one half of one Trillion dollars.

One half of one Trillion = 500 Billion = 500,000,000,000

1 Billion = 1,000 Million = 1,000,000,000

@ $10k per leased acre ($10,000.00 per leased acre) it would take :

$1,000,000.00 (one million dollars) to transfer 100 (one hundred) leased acres 

$10,000,000.00 (ten million dollars) to transfer 1000 (one thousand) leased acres

$100,000,000.00 (one hundred million dollars) to transfer 10,000 (ten thousand) leased acres

$1,000,000,000.00 (one billion dollars) to transfer 100,000 (one hundred thousand) leased acres 

$10,000,000,000.00 (ten billion dollars) to transfer 1,000,000 (one million) leased acres

$100,000,000,000.00 (one hundred billion dollars to transfer 10,000,000 (ten million) leased acres

However, when they buy, they may also have to buy other things - like debt, equipment, tools, owned real estate / whatever they have to sell - unless the deal is for only leases.

So, bottom line is a half trillion is a lot of Jing but it seems to me to take a lot of Jing to be involved in the oil and gas business.